./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.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 20da2548babe3ea7ba69c8856235b685b3dad9dcce2cbb8d7159e2037477f2fb --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:09:08,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:09:08,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:09:08,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:09:08,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:09:08,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:09:08,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:09:08,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:09:08,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:09:08,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:09:08,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:09:08,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:09:08,438 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:09:08,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:09:08,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:09:08,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:09:08,442 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:09:08,443 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:09:08,444 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:09:08,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:09:08,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:09:08,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:09:08,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:09:08,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:09:08,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:09:08,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:09:08,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:09:08,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:09:08,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:09:08,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:09:08,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:09:08,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:09:08,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:09:08,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:09:08,458 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:09:08,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:09:08,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:09:08,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:09:08,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:09:08,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:09:08,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:09:08,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:09:08,482 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:09:08,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:09:08,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:09:08,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:09:08,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:09:08,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:09:08,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:09:08,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:09:08,485 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:09:08,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:09:08,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:09:08,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:09:08,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:09:08,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:09:08,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:09:08,492 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:09:08,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:09:08,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:09:08,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:09:08,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:09:08,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:09:08,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:09:08,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:09:08,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:09:08,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:09:08,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:09:08,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:09:08,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:09:08,495 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:09:08,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:09:08,495 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:09:08,495 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:09:08,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:09:08,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:09:08,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20da2548babe3ea7ba69c8856235b685b3dad9dcce2cbb8d7159e2037477f2fb [2021-12-17 21:09:08,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:09:08,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:09:08,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:09:08,759 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:09:08,760 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:09:08,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-17 21:09:08,822 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d453da64/23ab399cca8d4f2a90c40f340d50f119/FLAGfa34f4b31 [2021-12-17 21:09:09,197 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:09:09,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-17 21:09:09,215 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d453da64/23ab399cca8d4f2a90c40f340d50f119/FLAGfa34f4b31 [2021-12-17 21:09:09,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d453da64/23ab399cca8d4f2a90c40f340d50f119 [2021-12-17 21:09:09,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:09:09,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:09:09,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:09:09,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:09:09,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:09:09,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:09:09" (1/1) ... [2021-12-17 21:09:09,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f7d50b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:09, skipping insertion in model container [2021-12-17 21:09:09,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:09:09" (1/1) ... [2021-12-17 21:09:09,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:09:09,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:09:09,746 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[911,924] [2021-12-17 21:09:09,846 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[8416,8429] [2021-12-17 21:09:09,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:09:09,993 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:09:10,006 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[911,924] [2021-12-17 21:09:10,017 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.09.cil-2.c[8416,8429] [2021-12-17 21:09:10,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:09:10,058 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:09:10,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10 WrapperNode [2021-12-17 21:09:10,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:09:10,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:09:10,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:09:10,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:09:10,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,080 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,132 INFO L137 Inliner]: procedures = 73, calls = 89, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 909 [2021-12-17 21:09:10,135 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:09:10,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:09:10,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:09:10,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:09:10,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:09:10,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:09:10,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:09:10,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:09:10,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (1/1) ... [2021-12-17 21:09:10,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:09:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:09:10,222 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) [2021-12-17 21:09:10,224 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 [2021-12-17 21:09:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:09:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:09:10,251 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:09:10,251 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:09:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:09:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:09:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:09:10,253 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:09:10,253 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:09:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:09:10,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:09:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:09:10,254 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:09:10,254 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:09:10,254 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:09:10,255 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:09:10,255 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:09:10,255 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:09:10,255 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:09:10,255 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:09:10,255 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:09:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:09:10,256 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:09:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:09:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:09:10,256 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:09:10,256 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:09:10,256 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:09:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:09:10,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:09:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:09:10,257 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:09:10,257 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:09:10,258 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:09:10,400 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:09:10,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:09:11,023 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-17 21:09:11,024 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-17 21:09:11,102 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:09:11,115 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:09:11,115 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-12-17 21:09:11,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:09:11 BoogieIcfgContainer [2021-12-17 21:09:11,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:09:11,124 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:09:11,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:09:11,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:09:11,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:09:09" (1/3) ... [2021-12-17 21:09:11,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a98f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:09:11, skipping insertion in model container [2021-12-17 21:09:11,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:10" (2/3) ... [2021-12-17 21:09:11,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a98f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:09:11, skipping insertion in model container [2021-12-17 21:09:11,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:09:11" (3/3) ... [2021-12-17 21:09:11,131 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.09.cil-2.c [2021-12-17 21:09:11,139 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:09:11,140 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:09:11,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:09:11,191 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 [2021-12-17 21:09:11,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:09:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 432 states, 373 states have (on average 1.6300268096514745) internal successors, (608), 381 states have internal predecessors, (608), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-17 21:09:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:11,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:11,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:11,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash 140273204, now seen corresponding path program 1 times [2021-12-17 21:09:11,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:11,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558477035] [2021-12-17 21:09:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:11,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:11,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:11,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558477035] [2021-12-17 21:09:11,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558477035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:11,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:11,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:09:11,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482290287] [2021-12-17 21:09:11,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:11,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:09:11,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:11,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:09:11,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:09:11,623 INFO L87 Difference]: Start difference. First operand has 432 states, 373 states have (on average 1.6300268096514745) internal successors, (608), 381 states have internal predecessors, (608), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:12,288 INFO L93 Difference]: Finished difference Result 857 states and 1368 transitions. [2021-12-17 21:09:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:09:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:09:12,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:12,303 INFO L225 Difference]: With dead ends: 857 [2021-12-17 21:09:12,303 INFO L226 Difference]: Without dead ends: 439 [2021-12-17 21:09:12,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:12,312 INFO L933 BasicCegarLoop]: 649 mSDtfsCounter, 669 mSDsluCounter, 1178 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:12,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1827 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:09:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-17 21:09:12,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2021-12-17 21:09:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 365 states have (on average 1.5424657534246575) internal successors, (563), 370 states have internal predecessors, (563), 41 states have call successors, (41), 15 states have call predecessors, (41), 13 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-17 21:09:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 641 transitions. [2021-12-17 21:09:12,412 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 641 transitions. Word has length 65 [2021-12-17 21:09:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:12,412 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 641 transitions. [2021-12-17 21:09:12,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 641 transitions. [2021-12-17 21:09:12,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:12,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:12,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:12,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:09:12,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:12,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:12,418 INFO L85 PathProgramCache]: Analyzing trace with hash 99598454, now seen corresponding path program 1 times [2021-12-17 21:09:12,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:12,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994998015] [2021-12-17 21:09:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:12,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:12,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994998015] [2021-12-17 21:09:12,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994998015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:12,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:12,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:12,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299701031] [2021-12-17 21:09:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:12,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:12,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:12,552 INFO L87 Difference]: Start difference. First operand 421 states and 641 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:13,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:13,492 INFO L93 Difference]: Finished difference Result 676 states and 1010 transitions. [2021-12-17 21:09:13,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:09:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:13,497 INFO L225 Difference]: With dead ends: 676 [2021-12-17 21:09:13,497 INFO L226 Difference]: Without dead ends: 572 [2021-12-17 21:09:13,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:09:13,499 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 1098 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:13,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1105 Valid, 2196 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:09:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-12-17 21:09:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 533. [2021-12-17 21:09:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 455 states have (on average 1.5142857142857142) internal successors, (689), 462 states have internal predecessors, (689), 54 states have call successors, (54), 22 states have call predecessors, (54), 22 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2021-12-17 21:09:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 798 transitions. [2021-12-17 21:09:13,543 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 798 transitions. Word has length 65 [2021-12-17 21:09:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:13,543 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 798 transitions. [2021-12-17 21:09:13,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 798 transitions. [2021-12-17 21:09:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:13,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:13,546 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:13,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:09:13,547 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:13,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1778487094, now seen corresponding path program 1 times [2021-12-17 21:09:13,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:13,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206879362] [2021-12-17 21:09:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:13,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:13,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:13,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206879362] [2021-12-17 21:09:13,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206879362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:13,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:13,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:13,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751862814] [2021-12-17 21:09:13,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:13,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:13,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:13,681 INFO L87 Difference]: Start difference. First operand 533 states and 798 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:14,725 INFO L93 Difference]: Finished difference Result 930 states and 1363 transitions. [2021-12-17 21:09:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:09:14,725 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:09:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:14,730 INFO L225 Difference]: With dead ends: 930 [2021-12-17 21:09:14,730 INFO L226 Difference]: Without dead ends: 721 [2021-12-17 21:09:14,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:09:14,732 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 1553 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 2039 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:14,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 2039 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:09:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-17 21:09:14,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 645. [2021-12-17 21:09:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 545 states have (on average 1.4935779816513761) internal successors, (814), 554 states have internal predecessors, (814), 67 states have call successors, (67), 29 states have call predecessors, (67), 31 states have return successors, (76), 65 states have call predecessors, (76), 63 states have call successors, (76) [2021-12-17 21:09:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 957 transitions. [2021-12-17 21:09:14,769 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 957 transitions. Word has length 65 [2021-12-17 21:09:14,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:14,770 INFO L470 AbstractCegarLoop]: Abstraction has 645 states and 957 transitions. [2021-12-17 21:09:14,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 957 transitions. [2021-12-17 21:09:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:14,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:14,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:14,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:09:14,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:14,774 INFO L85 PathProgramCache]: Analyzing trace with hash -250099016, now seen corresponding path program 1 times [2021-12-17 21:09:14,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:14,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770347499] [2021-12-17 21:09:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:14,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:14,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:14,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770347499] [2021-12-17 21:09:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770347499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:14,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:14,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:09:14,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068930391] [2021-12-17 21:09:14,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:09:14,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:14,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:09:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:09:14,888 INFO L87 Difference]: Start difference. First operand 645 states and 957 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 21:09:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:16,770 INFO L93 Difference]: Finished difference Result 2191 states and 3154 transitions. [2021-12-17 21:09:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:09:16,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-17 21:09:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:16,784 INFO L225 Difference]: With dead ends: 2191 [2021-12-17 21:09:16,784 INFO L226 Difference]: Without dead ends: 1858 [2021-12-17 21:09:16,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:09:16,796 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 3779 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 2534 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:16,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3801 Valid, 2534 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 1610 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:09:16,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-12-17 21:09:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1698. [2021-12-17 21:09:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1393 states have (on average 1.407035175879397) internal successors, (1960), 1417 states have internal predecessors, (1960), 177 states have call successors, (177), 112 states have call predecessors, (177), 126 states have return successors, (209), 171 states have call predecessors, (209), 173 states have call successors, (209) [2021-12-17 21:09:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2346 transitions. [2021-12-17 21:09:16,910 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2346 transitions. Word has length 65 [2021-12-17 21:09:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 2346 transitions. [2021-12-17 21:09:16,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 21:09:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2346 transitions. [2021-12-17 21:09:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:09:16,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:16,914 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:16,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:09:16,915 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:16,915 INFO L85 PathProgramCache]: Analyzing trace with hash -515912993, now seen corresponding path program 1 times [2021-12-17 21:09:16,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:16,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897414262] [2021-12-17 21:09:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:16,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:09:17,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:09:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:17,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897414262] [2021-12-17 21:09:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897414262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:17,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:17,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:09:17,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437057590] [2021-12-17 21:09:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:17,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:09:17,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:09:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:17,068 INFO L87 Difference]: Start difference. First operand 1698 states and 2346 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:17,978 INFO L93 Difference]: Finished difference Result 3226 states and 4425 transitions. [2021-12-17 21:09:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:09:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-17 21:09:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:17,987 INFO L225 Difference]: With dead ends: 3226 [2021-12-17 21:09:17,988 INFO L226 Difference]: Without dead ends: 1846 [2021-12-17 21:09:18,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:18,012 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 816 mSDsluCounter, 2080 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:18,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 2707 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:09:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-17 21:09:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1738. [2021-12-17 21:09:18,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1425 states have (on average 1.3936842105263159) internal successors, (1986), 1449 states have internal predecessors, (1986), 177 states have call successors, (177), 112 states have call predecessors, (177), 134 states have return successors, (217), 179 states have call predecessors, (217), 173 states have call successors, (217) [2021-12-17 21:09:18,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 2380 transitions. [2021-12-17 21:09:18,087 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 2380 transitions. Word has length 66 [2021-12-17 21:09:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:18,088 INFO L470 AbstractCegarLoop]: Abstraction has 1738 states and 2380 transitions. [2021-12-17 21:09:18,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:18,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 2380 transitions. [2021-12-17 21:09:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:09:18,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:18,090 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:18,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:09:18,091 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1545272291, now seen corresponding path program 1 times [2021-12-17 21:09:18,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:18,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110560398] [2021-12-17 21:09:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:18,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:09:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:09:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:18,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:18,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110560398] [2021-12-17 21:09:18,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110560398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:18,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:18,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:09:18,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875421693] [2021-12-17 21:09:18,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:18,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:09:18,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:09:18,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:09:18,202 INFO L87 Difference]: Start difference. First operand 1738 states and 2380 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:09:20,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:20,013 INFO L93 Difference]: Finished difference Result 5310 states and 7254 transitions. [2021-12-17 21:09:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:09:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 66 [2021-12-17 21:09:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:20,024 INFO L225 Difference]: With dead ends: 5310 [2021-12-17 21:09:20,024 INFO L226 Difference]: Without dead ends: 2129 [2021-12-17 21:09:20,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:09:20,032 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 3475 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 677 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 2355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 677 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:20,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 2936 Invalid, 2355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [677 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:09:20,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2021-12-17 21:09:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1949. [2021-12-17 21:09:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1564 states have (on average 1.350383631713555) internal successors, (2112), 1590 states have internal predecessors, (2112), 217 states have call successors, (217), 140 states have call predecessors, (217), 166 states have return successors, (263), 221 states have call predecessors, (263), 213 states have call successors, (263) [2021-12-17 21:09:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2592 transitions. [2021-12-17 21:09:20,142 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2592 transitions. Word has length 66 [2021-12-17 21:09:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:20,143 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2592 transitions. [2021-12-17 21:09:20,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-17 21:09:20,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2592 transitions. [2021-12-17 21:09:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:20,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:20,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:20,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:09:20,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 428939397, now seen corresponding path program 1 times [2021-12-17 21:09:20,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:20,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840237248] [2021-12-17 21:09:20,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:20,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:09:20,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:20,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840237248] [2021-12-17 21:09:20,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840237248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:20,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:20,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:09:20,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890715012] [2021-12-17 21:09:20,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:20,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:09:20,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:20,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:09:20,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:20,247 INFO L87 Difference]: Start difference. First operand 1949 states and 2592 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:21,170 INFO L93 Difference]: Finished difference Result 3774 states and 4994 transitions. [2021-12-17 21:09:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:09:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2021-12-17 21:09:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:21,183 INFO L225 Difference]: With dead ends: 3774 [2021-12-17 21:09:21,184 INFO L226 Difference]: Without dead ends: 2143 [2021-12-17 21:09:21,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:09:21,190 INFO L933 BasicCegarLoop]: 614 mSDtfsCounter, 541 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 2925 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:21,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 2925 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:09:21,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-12-17 21:09:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 2009. [2021-12-17 21:09:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1612 states have (on average 1.336228287841191) internal successors, (2154), 1638 states have internal predecessors, (2154), 217 states have call successors, (217), 140 states have call predecessors, (217), 178 states have return successors, (275), 233 states have call predecessors, (275), 213 states have call successors, (275) [2021-12-17 21:09:21,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2646 transitions. [2021-12-17 21:09:21,278 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2646 transitions. Word has length 91 [2021-12-17 21:09:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:21,279 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2646 transitions. [2021-12-17 21:09:21,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2646 transitions. [2021-12-17 21:09:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:21,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:21,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:21,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:09:21,281 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:21,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:21,282 INFO L85 PathProgramCache]: Analyzing trace with hash 872840071, now seen corresponding path program 1 times [2021-12-17 21:09:21,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:21,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705904960] [2021-12-17 21:09:21,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:21,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:09:21,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:21,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705904960] [2021-12-17 21:09:21,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705904960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:21,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:21,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:21,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179869062] [2021-12-17 21:09:21,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:21,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:21,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:21,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:21,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:21,414 INFO L87 Difference]: Start difference. First operand 2009 states and 2646 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:09:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:21,941 INFO L93 Difference]: Finished difference Result 5606 states and 7354 transitions. [2021-12-17 21:09:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:09:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-17 21:09:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:21,966 INFO L225 Difference]: With dead ends: 5606 [2021-12-17 21:09:21,967 INFO L226 Difference]: Without dead ends: 3916 [2021-12-17 21:09:21,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:09:21,973 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 1169 mSDsluCounter, 1226 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:21,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 1851 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:09:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2021-12-17 21:09:22,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3696. [2021-12-17 21:09:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3696 states, 2926 states have (on average 1.2956254272043746) internal successors, (3791), 2986 states have internal predecessors, (3791), 406 states have call successors, (406), 272 states have call predecessors, (406), 362 states have return successors, (607), 442 states have call predecessors, (607), 402 states have call successors, (607) [2021-12-17 21:09:22,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 4804 transitions. [2021-12-17 21:09:22,164 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 4804 transitions. Word has length 91 [2021-12-17 21:09:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:22,165 INFO L470 AbstractCegarLoop]: Abstraction has 3696 states and 4804 transitions. [2021-12-17 21:09:22,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:09:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 4804 transitions. [2021-12-17 21:09:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:22,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:22,168 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:22,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:09:22,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:22,170 INFO L85 PathProgramCache]: Analyzing trace with hash -184998007, now seen corresponding path program 1 times [2021-12-17 21:09:22,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:22,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555306638] [2021-12-17 21:09:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:22,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:09:22,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:22,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555306638] [2021-12-17 21:09:22,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555306638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:22,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:22,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:09:22,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766075360] [2021-12-17 21:09:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:22,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:09:22,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:22,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:09:22,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:09:22,253 INFO L87 Difference]: Start difference. First operand 3696 states and 4804 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:22,824 INFO L93 Difference]: Finished difference Result 5504 states and 7072 transitions. [2021-12-17 21:09:22,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:09:22,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-17 21:09:22,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:22,835 INFO L225 Difference]: With dead ends: 5504 [2021-12-17 21:09:22,836 INFO L226 Difference]: Without dead ends: 2127 [2021-12-17 21:09:22,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:22,845 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 657 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 1735 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 21:09:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2021-12-17 21:09:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 2009. [2021-12-17 21:09:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 1612 states have (on average 1.3095533498759304) internal successors, (2111), 1638 states have internal predecessors, (2111), 217 states have call successors, (217), 140 states have call predecessors, (217), 178 states have return successors, (275), 233 states have call predecessors, (275), 213 states have call successors, (275) [2021-12-17 21:09:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2603 transitions. [2021-12-17 21:09:22,942 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2603 transitions. Word has length 91 [2021-12-17 21:09:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:22,943 INFO L470 AbstractCegarLoop]: Abstraction has 2009 states and 2603 transitions. [2021-12-17 21:09:22,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2603 transitions. [2021-12-17 21:09:22,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 21:09:22,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:22,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:22,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:09:22,946 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:22,946 INFO L85 PathProgramCache]: Analyzing trace with hash -828087601, now seen corresponding path program 1 times [2021-12-17 21:09:22,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:22,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298408196] [2021-12-17 21:09:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:22,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:22,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:23,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:23,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:09:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:09:23,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:23,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298408196] [2021-12-17 21:09:23,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298408196] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:23,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:23,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:09:23,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013523818] [2021-12-17 21:09:23,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:23,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:09:23,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:23,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:09:23,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:23,051 INFO L87 Difference]: Start difference. First operand 2009 states and 2603 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:09:24,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:24,322 INFO L93 Difference]: Finished difference Result 4665 states and 5993 transitions. [2021-12-17 21:09:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 21:09:24,323 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 92 [2021-12-17 21:09:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:24,337 INFO L225 Difference]: With dead ends: 4665 [2021-12-17 21:09:24,337 INFO L226 Difference]: Without dead ends: 2823 [2021-12-17 21:09:24,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-17 21:09:24,344 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 2620 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2662 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:24,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2662 Valid, 1988 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:09:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-12-17 21:09:24,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2646. [2021-12-17 21:09:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2090 states have (on average 1.2708133971291866) internal successors, (2656), 2125 states have internal predecessors, (2656), 296 states have call successors, (296), 189 states have call predecessors, (296), 258 states have return successors, (411), 334 states have call predecessors, (411), 292 states have call successors, (411) [2021-12-17 21:09:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3363 transitions. [2021-12-17 21:09:24,485 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3363 transitions. Word has length 92 [2021-12-17 21:09:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:24,486 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3363 transitions. [2021-12-17 21:09:24,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:09:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3363 transitions. [2021-12-17 21:09:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:24,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:24,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:24,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:09:24,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:24,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1167702267, now seen corresponding path program 1 times [2021-12-17 21:09:24,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:24,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881311446] [2021-12-17 21:09:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:24,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:24,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:24,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881311446] [2021-12-17 21:09:24,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881311446] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:24,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:24,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:09:24,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491234547] [2021-12-17 21:09:24,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:24,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:09:24,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:09:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:09:24,601 INFO L87 Difference]: Start difference. First operand 2646 states and 3363 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:25,748 INFO L93 Difference]: Finished difference Result 3051 states and 4013 transitions. [2021-12-17 21:09:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 146 [2021-12-17 21:09:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:25,760 INFO L225 Difference]: With dead ends: 3051 [2021-12-17 21:09:25,761 INFO L226 Difference]: Without dead ends: 2755 [2021-12-17 21:09:25,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:25,763 INFO L933 BasicCegarLoop]: 673 mSDtfsCounter, 922 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:25,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 1227 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:09:25,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-12-17 21:09:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2646. [2021-12-17 21:09:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 2090 states have (on average 1.270334928229665) internal successors, (2655), 2125 states have internal predecessors, (2655), 296 states have call successors, (296), 189 states have call predecessors, (296), 258 states have return successors, (411), 334 states have call predecessors, (411), 292 states have call successors, (411) [2021-12-17 21:09:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3362 transitions. [2021-12-17 21:09:25,935 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3362 transitions. Word has length 146 [2021-12-17 21:09:25,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:25,936 INFO L470 AbstractCegarLoop]: Abstraction has 2646 states and 3362 transitions. [2021-12-17 21:09:25,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3362 transitions. [2021-12-17 21:09:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:25,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:25,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:25,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 21:09:25,940 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1712574841, now seen corresponding path program 1 times [2021-12-17 21:09:25,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:25,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813351572] [2021-12-17 21:09:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:25,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:26,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:26,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813351572] [2021-12-17 21:09:26,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813351572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:26,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:26,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:09:26,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275568284] [2021-12-17 21:09:26,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:26,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:09:26,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:26,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:09:26,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:09:26,067 INFO L87 Difference]: Start difference. First operand 2646 states and 3362 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-17 21:09:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:28,104 INFO L93 Difference]: Finished difference Result 3460 states and 4673 transitions. [2021-12-17 21:09:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:09:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:28,118 INFO L225 Difference]: With dead ends: 3460 [2021-12-17 21:09:28,118 INFO L226 Difference]: Without dead ends: 3168 [2021-12-17 21:09:28,121 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 [2021-12-17 21:09:28,121 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1462 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:28,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1845 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1689 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 21:09:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-12-17 21:09:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2949. [2021-12-17 21:09:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2368 states have (on average 1.308277027027027) internal successors, (3098), 2404 states have internal predecessors, (3098), 314 states have call successors, (314), 195 states have call predecessors, (314), 265 states have return successors, (432), 352 states have call predecessors, (432), 310 states have call successors, (432) [2021-12-17 21:09:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3844 transitions. [2021-12-17 21:09:28,326 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3844 transitions. Word has length 146 [2021-12-17 21:09:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:28,327 INFO L470 AbstractCegarLoop]: Abstraction has 2949 states and 3844 transitions. [2021-12-17 21:09:28,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 4 states have internal predecessors, (135), 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) [2021-12-17 21:09:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3844 transitions. [2021-12-17 21:09:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:28,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:28,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:28,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:09:28,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -88890763, now seen corresponding path program 1 times [2021-12-17 21:09:28,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404912209] [2021-12-17 21:09:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:28,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:28,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:28,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404912209] [2021-12-17 21:09:28,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404912209] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:28,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:28,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:28,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564230810] [2021-12-17 21:09:28,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:28,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:28,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:28,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:28,456 INFO L87 Difference]: Start difference. First operand 2949 states and 3844 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:30,793 INFO L93 Difference]: Finished difference Result 4188 states and 5840 transitions. [2021-12-17 21:09:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:30,806 INFO L225 Difference]: With dead ends: 4188 [2021-12-17 21:09:30,807 INFO L226 Difference]: Without dead ends: 3593 [2021-12-17 21:09:30,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:30,810 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 1477 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 2817 SdHoareTripleChecker+Invalid, 2727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:30,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 2817 Invalid, 2727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2614 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:09:30,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-17 21:09:30,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3231. [2021-12-17 21:09:30,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 2625 states have (on average 1.3329523809523809) internal successors, (3499), 2662 states have internal predecessors, (3499), 332 states have call successors, (332), 201 states have call predecessors, (332), 272 states have return successors, (452), 371 states have call predecessors, (452), 328 states have call successors, (452) [2021-12-17 21:09:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4283 transitions. [2021-12-17 21:09:30,996 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4283 transitions. Word has length 146 [2021-12-17 21:09:30,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:30,996 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 4283 transitions. [2021-12-17 21:09:30,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4283 transitions. [2021-12-17 21:09:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:31,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:31,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:31,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:09:31,000 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash -795487369, now seen corresponding path program 1 times [2021-12-17 21:09:31,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:31,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113144318] [2021-12-17 21:09:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:31,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:31,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:31,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113144318] [2021-12-17 21:09:31,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113144318] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:31,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:31,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:31,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824380280] [2021-12-17 21:09:31,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:31,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:31,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:31,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:31,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:31,144 INFO L87 Difference]: Start difference. First operand 3231 states and 4283 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:33,451 INFO L93 Difference]: Finished difference Result 5261 states and 7547 transitions. [2021-12-17 21:09:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:33,471 INFO L225 Difference]: With dead ends: 5261 [2021-12-17 21:09:33,471 INFO L226 Difference]: Without dead ends: 4384 [2021-12-17 21:09:33,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:33,477 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 1474 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 2805 SdHoareTripleChecker+Invalid, 2736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:33,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 2805 Invalid, 2736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:09:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-12-17 21:09:33,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3796. [2021-12-17 21:09:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3140 states have (on average 1.370063694267516) internal successors, (4302), 3179 states have internal predecessors, (4302), 368 states have call successors, (368), 213 states have call predecessors, (368), 286 states have return successors, (496), 409 states have call predecessors, (496), 364 states have call successors, (496) [2021-12-17 21:09:33,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5166 transitions. [2021-12-17 21:09:33,718 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5166 transitions. Word has length 146 [2021-12-17 21:09:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:33,718 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 5166 transitions. [2021-12-17 21:09:33,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:33,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5166 transitions. [2021-12-17 21:09:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:33,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:33,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:33,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:09:33,723 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:33,723 INFO L85 PathProgramCache]: Analyzing trace with hash 151550517, now seen corresponding path program 1 times [2021-12-17 21:09:33,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:33,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406341538] [2021-12-17 21:09:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:33,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:33,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:33,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:33,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:33,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:33,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:33,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:33,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406341538] [2021-12-17 21:09:33,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406341538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:33,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:33,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:33,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975326627] [2021-12-17 21:09:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:33,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:33,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:33,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:33,850 INFO L87 Difference]: Start difference. First operand 3796 states and 5166 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:35,339 INFO L93 Difference]: Finished difference Result 5814 states and 8421 transitions. [2021-12-17 21:09:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:35,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:35,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:35,363 INFO L225 Difference]: With dead ends: 5814 [2021-12-17 21:09:35,363 INFO L226 Difference]: Without dead ends: 4372 [2021-12-17 21:09:35,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:35,370 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 1125 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:35,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 1660 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:09:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4372 states. [2021-12-17 21:09:35,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4372 to 3796. [2021-12-17 21:09:35,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3140 states have (on average 1.3684713375796178) internal successors, (4297), 3179 states have internal predecessors, (4297), 368 states have call successors, (368), 213 states have call predecessors, (368), 286 states have return successors, (496), 409 states have call predecessors, (496), 364 states have call successors, (496) [2021-12-17 21:09:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 5161 transitions. [2021-12-17 21:09:35,628 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 5161 transitions. Word has length 146 [2021-12-17 21:09:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:35,628 INFO L470 AbstractCegarLoop]: Abstraction has 3796 states and 5161 transitions. [2021-12-17 21:09:35,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 5161 transitions. [2021-12-17 21:09:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:35,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:35,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:35,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:09:35,633 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:35,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1013384119, now seen corresponding path program 1 times [2021-12-17 21:09:35,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792651454] [2021-12-17 21:09:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:35,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:35,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:35,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:35,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:35,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:35,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:35,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792651454] [2021-12-17 21:09:35,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792651454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:35,754 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:35,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:35,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857507767] [2021-12-17 21:09:35,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:35,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:35,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:35,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:35,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:35,756 INFO L87 Difference]: Start difference. First operand 3796 states and 5161 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:38,422 INFO L93 Difference]: Finished difference Result 7319 states and 10778 transitions. [2021-12-17 21:09:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:38,423 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:38,442 INFO L225 Difference]: With dead ends: 7319 [2021-12-17 21:09:38,442 INFO L226 Difference]: Without dead ends: 5877 [2021-12-17 21:09:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:38,447 INFO L933 BasicCegarLoop]: 930 mSDtfsCounter, 1462 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 2795 SdHoareTripleChecker+Invalid, 2713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:38,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 2795 Invalid, 2713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:09:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-12-17 21:09:38,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4931. [2021-12-17 21:09:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4175 states have (on average 1.4141317365269461) internal successors, (5904), 4218 states have internal predecessors, (5904), 440 states have call successors, (440), 237 states have call predecessors, (440), 314 states have return successors, (590), 485 states have call predecessors, (590), 436 states have call successors, (590) [2021-12-17 21:09:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 6934 transitions. [2021-12-17 21:09:38,731 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 6934 transitions. Word has length 146 [2021-12-17 21:09:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:38,732 INFO L470 AbstractCegarLoop]: Abstraction has 4931 states and 6934 transitions. [2021-12-17 21:09:38,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 6934 transitions. [2021-12-17 21:09:38,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:38,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:38,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:38,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:09:38,737 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:38,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1037024779, now seen corresponding path program 1 times [2021-12-17 21:09:38,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:38,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151938829] [2021-12-17 21:09:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:38,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:38,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:38,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151938829] [2021-12-17 21:09:38,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151938829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:38,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:38,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:38,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649274563] [2021-12-17 21:09:38,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:38,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:38,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:38,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:38,858 INFO L87 Difference]: Start difference. First operand 4931 states and 6934 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:41,538 INFO L93 Difference]: Finished difference Result 11448 states and 17307 transitions. [2021-12-17 21:09:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:41,572 INFO L225 Difference]: With dead ends: 11448 [2021-12-17 21:09:41,572 INFO L226 Difference]: Without dead ends: 8871 [2021-12-17 21:09:41,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:41,584 INFO L933 BasicCegarLoop]: 926 mSDtfsCounter, 1458 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:41,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 2791 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:09:41,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8871 states. [2021-12-17 21:09:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8871 to 7205. [2021-12-17 21:09:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 6249 states have (on average 1.4597535605696912) internal successors, (9122), 6300 states have internal predecessors, (9122), 584 states have call successors, (584), 285 states have call predecessors, (584), 370 states have return successors, (796), 637 states have call predecessors, (796), 580 states have call successors, (796) [2021-12-17 21:09:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 10502 transitions. [2021-12-17 21:09:42,095 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 10502 transitions. Word has length 146 [2021-12-17 21:09:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:42,096 INFO L470 AbstractCegarLoop]: Abstraction has 7205 states and 10502 transitions. [2021-12-17 21:09:42,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 10502 transitions. [2021-12-17 21:09:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:42,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:42,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:42,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:09:42,103 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash -548977673, now seen corresponding path program 1 times [2021-12-17 21:09:42,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581749312] [2021-12-17 21:09:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:42,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:42,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581749312] [2021-12-17 21:09:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581749312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:42,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:42,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:42,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150404288] [2021-12-17 21:09:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:42,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:42,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:42,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:42,229 INFO L87 Difference]: Start difference. First operand 7205 states and 10502 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:44,958 INFO L93 Difference]: Finished difference Result 19704 states and 30421 transitions. [2021-12-17 21:09:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:45,012 INFO L225 Difference]: With dead ends: 19704 [2021-12-17 21:09:45,012 INFO L226 Difference]: Without dead ends: 14853 [2021-12-17 21:09:45,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:45,094 INFO L933 BasicCegarLoop]: 920 mSDtfsCounter, 1457 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 2785 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:45,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 2785 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 2584 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:09:45,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14853 states. [2021-12-17 21:09:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14853 to 11767. [2021-12-17 21:09:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11767 states, 10411 states have (on average 1.4963019882816253) internal successors, (15578), 10478 states have internal predecessors, (15578), 872 states have call successors, (872), 381 states have call predecessors, (872), 482 states have return successors, (1262), 941 states have call predecessors, (1262), 868 states have call successors, (1262) [2021-12-17 21:09:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11767 states to 11767 states and 17712 transitions. [2021-12-17 21:09:45,778 INFO L78 Accepts]: Start accepts. Automaton has 11767 states and 17712 transitions. Word has length 146 [2021-12-17 21:09:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:45,779 INFO L470 AbstractCegarLoop]: Abstraction has 11767 states and 17712 transitions. [2021-12-17 21:09:45,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11767 states and 17712 transitions. [2021-12-17 21:09:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:45,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:45,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:45,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:09:45,789 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:45,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1641612875, now seen corresponding path program 1 times [2021-12-17 21:09:45,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:45,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880294599] [2021-12-17 21:09:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:45,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:45,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:45,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:45,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:45,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:45,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:45,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:45,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880294599] [2021-12-17 21:09:45,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880294599] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:45,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:45,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:45,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201157010] [2021-12-17 21:09:45,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:45,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:45,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:45,909 INFO L87 Difference]: Start difference. First operand 11767 states and 17712 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:49,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:49,254 INFO L93 Difference]: Finished difference Result 36184 states and 56779 transitions. [2021-12-17 21:09:49,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:49,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:49,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:49,341 INFO L225 Difference]: With dead ends: 36184 [2021-12-17 21:09:49,341 INFO L226 Difference]: Without dead ends: 26771 [2021-12-17 21:09:49,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:49,375 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 1452 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:49,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 2777 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2564 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:09:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26771 states. [2021-12-17 21:09:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26771 to 20954. [2021-12-17 21:09:50,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20954 states, 18798 states have (on average 1.5214384508990317) internal successors, (28600), 18897 states have internal predecessors, (28600), 1448 states have call successors, (1448), 573 states have call predecessors, (1448), 706 states have return successors, (2356), 1549 states have call predecessors, (2356), 1444 states have call successors, (2356) [2021-12-17 21:09:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 32404 transitions. [2021-12-17 21:09:50,733 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 32404 transitions. Word has length 146 [2021-12-17 21:09:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:50,733 INFO L470 AbstractCegarLoop]: Abstraction has 20954 states and 32404 transitions. [2021-12-17 21:09:50,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:50,733 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 32404 transitions. [2021-12-17 21:09:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:50,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:50,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:50,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:09:50,748 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash 810878707, now seen corresponding path program 1 times [2021-12-17 21:09:50,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:50,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254692843] [2021-12-17 21:09:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:50,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:50,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:50,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254692843] [2021-12-17 21:09:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254692843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:50,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:50,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:50,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979142456] [2021-12-17 21:09:50,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:50,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:50,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:50,859 INFO L87 Difference]: Start difference. First operand 20954 states and 32404 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:55,228 INFO L93 Difference]: Finished difference Result 69211 states and 110225 transitions. [2021-12-17 21:09:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:09:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:55,441 INFO L225 Difference]: With dead ends: 69211 [2021-12-17 21:09:55,442 INFO L226 Difference]: Without dead ends: 50611 [2021-12-17 21:09:55,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:55,523 INFO L933 BasicCegarLoop]: 907 mSDtfsCounter, 1451 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:55,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1479 Valid, 2772 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:09:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50611 states. [2021-12-17 21:09:57,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50611 to 39389. [2021-12-17 21:09:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39389 states, 35633 states have (on average 1.5360480453512193) internal successors, (54734), 35796 states have internal predecessors, (54734), 2600 states have call successors, (2600), 957 states have call predecessors, (2600), 1154 states have return successors, (5030), 2765 states have call predecessors, (5030), 2596 states have call successors, (5030) [2021-12-17 21:09:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39389 states to 39389 states and 62364 transitions. [2021-12-17 21:09:58,260 INFO L78 Accepts]: Start accepts. Automaton has 39389 states and 62364 transitions. Word has length 146 [2021-12-17 21:09:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:58,260 INFO L470 AbstractCegarLoop]: Abstraction has 39389 states and 62364 transitions. [2021-12-17 21:09:58,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:09:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 39389 states and 62364 transitions. [2021-12-17 21:09:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:09:58,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:58,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:58,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:09:58,287 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:58,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -911123979, now seen corresponding path program 1 times [2021-12-17 21:09:58,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:58,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807452715] [2021-12-17 21:09:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:58,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:09:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:09:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:09:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:09:58,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:58,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:58,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807452715] [2021-12-17 21:09:58,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807452715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:58,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:58,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:58,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86589740] [2021-12-17 21:09:58,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:58,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:58,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:58,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:58,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:58,403 INFO L87 Difference]: Start difference. First operand 39389 states and 62364 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:10:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:07,232 INFO L93 Difference]: Finished difference Result 152544 states and 245333 transitions. [2021-12-17 21:10:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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 146 [2021-12-17 21:10:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:07,867 INFO L225 Difference]: With dead ends: 152544 [2021-12-17 21:10:07,868 INFO L226 Difference]: Without dead ends: 115509 [2021-12-17 21:10:07,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:10:07,957 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 1543 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 2909 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:07,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1570 Valid, 2909 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2982 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:10:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115509 states. [2021-12-17 21:10:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115509 to 76002. [2021-12-17 21:10:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76002 states, 69174 states have (on average 1.5458987480845405) internal successors, (106936), 69465 states have internal predecessors, (106936), 4776 states have call successors, (4776), 1725 states have call predecessors, (4776), 2050 states have return successors, (11708), 5069 states have call predecessors, (11708), 4772 states have call successors, (11708) [2021-12-17 21:10:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76002 states to 76002 states and 123420 transitions. [2021-12-17 21:10:12,442 INFO L78 Accepts]: Start accepts. Automaton has 76002 states and 123420 transitions. Word has length 146 [2021-12-17 21:10:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:12,443 INFO L470 AbstractCegarLoop]: Abstraction has 76002 states and 123420 transitions. [2021-12-17 21:10:12,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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) [2021-12-17 21:10:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 76002 states and 123420 transitions. [2021-12-17 21:10:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-17 21:10:12,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:12,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:12,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:10:12,489 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:12,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1243767117, now seen corresponding path program 1 times [2021-12-17 21:10:12,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:12,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670020006] [2021-12-17 21:10:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:12,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 21:10:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 21:10:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-17 21:10:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-17 21:10:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:12,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:12,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670020006] [2021-12-17 21:10:12,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670020006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:12,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:12,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:12,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347497155] [2021-12-17 21:10:12,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:12,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:12,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:12,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:12,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:12,608 INFO L87 Difference]: Start difference. First operand 76002 states and 123420 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 5 states have internal predecessors, (135), 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)