./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8 --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 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 15:21:05,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:21:05,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:21:05,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:21:05,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:21:05,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:21:05,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:21:05,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:21:05,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:21:05,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:21:05,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:21:05,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:21:05,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:21:05,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:21:05,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:21:05,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:21:05,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:21:05,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:21:05,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:21:05,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:21:05,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:21:05,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:21:05,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:21:05,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:21:05,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:21:05,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:21:05,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:21:05,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:21:05,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:21:05,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:21:05,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:21:05,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:21:05,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:21:05,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:21:05,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:21:05,673 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:21:05,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:21:05,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:21:05,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:21:05,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:21:05,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:21:05,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:21:05,691 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:21:05,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:21:05,691 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:21:05,691 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:21:05,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:21:05,692 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:21:05,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:21:05,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:21:05,692 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:21:05,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:21:05,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:21:05,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:21:05,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:21:05,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:21:05,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:21:05,696 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:21:05,696 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39b635cc2ab0f0d4f8e606a07f9fc2cea48a2218c52549f8b5aa54058d2e5b4b [2022-12-13 15:21:05,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:21:05,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:21:05,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:21:05,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:21:05,881 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:21:05,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2022-12-13 15:21:08,450 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:21:08,652 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:21:08,653 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2022-12-13 15:21:08,667 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/data/95328679c/18bc1efabc2541cab208826135f8614b/FLAG0a2721ffa [2022-12-13 15:21:09,033 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/data/95328679c/18bc1efabc2541cab208826135f8614b [2022-12-13 15:21:09,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:21:09,036 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:21:09,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:21:09,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:21:09,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:21:09,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387dbbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09, skipping insertion in model container [2022-12-13 15:21:09,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:21:09,078 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:21:09,181 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[914,927] [2022-12-13 15:21:09,217 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2022-12-13 15:21:09,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:21:09,283 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:21:09,292 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[914,927] [2022-12-13 15:21:09,305 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-2.c[7115,7128] [2022-12-13 15:21:09,342 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:21:09,357 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:21:09,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09 WrapperNode [2022-12-13 15:21:09,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:21:09,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:21:09,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:21:09,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:21:09,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,402 INFO L138 Inliner]: procedures = 71, calls = 85, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 871 [2022-12-13 15:21:09,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:21:09,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:21:09,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:21:09,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:21:09,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,413 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,432 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:21:09,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:21:09,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:21:09,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:21:09,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (1/1) ... [2022-12-13 15:21:09,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:21:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:21:09,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:21:09,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:21:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:21:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-13 15:21:09,496 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-13 15:21:09,496 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-12-13 15:21:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-13 15:21:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-13 15:21:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-12-13 15:21:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-13 15:21:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-13 15:21:09,497 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-12-13 15:21:09,497 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-12-13 15:21:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-12-13 15:21:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-13 15:21:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-13 15:21:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-12-13 15:21:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-12-13 15:21:09,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:21:09,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:21:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-13 15:21:09,499 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-13 15:21:09,499 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-13 15:21:09,499 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-13 15:21:09,596 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:21:09,597 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:21:10,161 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:21:10,169 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:21:10,169 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-13 15:21:10,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:21:10 BoogieIcfgContainer [2022-12-13 15:21:10,171 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:21:10,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:21:10,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:21:10,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:21:10,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:21:09" (1/3) ... [2022-12-13 15:21:10,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fea51dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:21:10, skipping insertion in model container [2022-12-13 15:21:10,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:21:09" (2/3) ... [2022-12-13 15:21:10,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fea51dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:21:10, skipping insertion in model container [2022-12-13 15:21:10,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:21:10" (3/3) ... [2022-12-13 15:21:10,177 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-2.c [2022-12-13 15:21:10,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:21:10,191 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 15:21:10,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:21:10,236 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5dc06345, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:21:10,236 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 15:21:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 359 states have (on average 1.6323119777158774) internal successors, (586), 367 states have internal predecessors, (586), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-12-13 15:21:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 15:21:10,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:10,249 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:10,250 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:10,253 INFO L85 PathProgramCache]: Analyzing trace with hash 910047860, now seen corresponding path program 1 times [2022-12-13 15:21:10,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:10,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572227628] [2022-12-13 15:21:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:10,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:10,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:10,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:10,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572227628] [2022-12-13 15:21:10,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572227628] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:10,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:10,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:21:10,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723545183] [2022-12-13 15:21:10,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:10,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:21:10,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:21:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:21:10,654 INFO L87 Difference]: Start difference. First operand has 416 states, 359 states have (on average 1.6323119777158774) internal successors, (586), 367 states have internal predecessors, (586), 39 states have call successors, (39), 15 states have call predecessors, (39), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) 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) [2022-12-13 15:21:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:11,543 INFO L93 Difference]: Finished difference Result 941 states and 1492 transitions. [2022-12-13 15:21:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:21:11,545 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 [2022-12-13 15:21:11,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:11,559 INFO L225 Difference]: With dead ends: 941 [2022-12-13 15:21:11,559 INFO L226 Difference]: Without dead ends: 540 [2022-12-13 15:21:11,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:21:11,568 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 1329 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:11,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1334 Valid, 1551 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:21:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-12-13 15:21:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 501. [2022-12-13 15:21:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 427 states have (on average 1.515222482435597) internal successors, (647), 434 states have internal predecessors, (647), 50 states have call successors, (50), 22 states have call predecessors, (50), 22 states have return successors, (51), 47 states have call predecessors, (51), 46 states have call successors, (51) [2022-12-13 15:21:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 748 transitions. [2022-12-13 15:21:11,649 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 748 transitions. Word has length 65 [2022-12-13 15:21:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:11,650 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 748 transitions. [2022-12-13 15:21:11,650 INFO L496 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) [2022-12-13 15:21:11,650 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 748 transitions. [2022-12-13 15:21:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 15:21:11,654 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:11,654 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:11,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:21:11,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1313833811, now seen corresponding path program 1 times [2022-12-13 15:21:11,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329720306] [2022-12-13 15:21:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:11,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329720306] [2022-12-13 15:21:11,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329720306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:11,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:11,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:21:11,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920168016] [2022-12-13 15:21:11,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:11,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:21:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:11,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:21:11,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:21:11,824 INFO L87 Difference]: Start difference. First operand 501 states and 748 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) [2022-12-13 15:21:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:12,817 INFO L93 Difference]: Finished difference Result 848 states and 1225 transitions. [2022-12-13 15:21:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:21:12,818 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 [2022-12-13 15:21:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:12,821 INFO L225 Difference]: With dead ends: 848 [2022-12-13 15:21:12,821 INFO L226 Difference]: Without dead ends: 671 [2022-12-13 15:21:12,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:21:12,823 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1209 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:12,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 2066 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:21:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2022-12-13 15:21:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 597. [2022-12-13 15:21:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 503 states have (on average 1.4930417495029822) internal successors, (751), 512 states have internal predecessors, (751), 61 states have call successors, (61), 29 states have call predecessors, (61), 31 states have return successors, (70), 59 states have call predecessors, (70), 57 states have call successors, (70) [2022-12-13 15:21:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 882 transitions. [2022-12-13 15:21:12,858 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 882 transitions. Word has length 65 [2022-12-13 15:21:12,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:12,859 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 882 transitions. [2022-12-13 15:21:12,859 INFO L496 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) [2022-12-13 15:21:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 882 transitions. [2022-12-13 15:21:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 15:21:12,860 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:12,861 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:12,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:21:12,861 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:12,861 INFO L85 PathProgramCache]: Analyzing trace with hash -714752299, now seen corresponding path program 1 times [2022-12-13 15:21:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968318865] [2022-12-13 15:21:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:12,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:12,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:12,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968318865] [2022-12-13 15:21:12,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968318865] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:12,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:12,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:21:12,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803017651] [2022-12-13 15:21:12,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:12,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:21:12,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:21:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:21:12,996 INFO L87 Difference]: Start difference. First operand 597 states and 882 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:13,858 INFO L93 Difference]: Finished difference Result 898 states and 1296 transitions. [2022-12-13 15:21:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:21:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-12-13 15:21:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:13,860 INFO L225 Difference]: With dead ends: 898 [2022-12-13 15:21:13,860 INFO L226 Difference]: Without dead ends: 631 [2022-12-13 15:21:13,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:21:13,862 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 538 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 2454 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:13,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 2454 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1685 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:21:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-12-13 15:21:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 602. [2022-12-13 15:21:13,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 507 states have (on average 1.485207100591716) internal successors, (753), 516 states have internal predecessors, (753), 61 states have call successors, (61), 29 states have call predecessors, (61), 32 states have return successors, (71), 60 states have call predecessors, (71), 57 states have call successors, (71) [2022-12-13 15:21:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 885 transitions. [2022-12-13 15:21:13,889 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 885 transitions. Word has length 65 [2022-12-13 15:21:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:13,889 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 885 transitions. [2022-12-13 15:21:13,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 885 transitions. [2022-12-13 15:21:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 15:21:13,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:13,894 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:13,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:21:13,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:13,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:13,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1744111597, now seen corresponding path program 1 times [2022-12-13 15:21:13,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:13,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252269443] [2022-12-13 15:21:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:13,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:13,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:13,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:13,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:13,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:13,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:14,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:14,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:14,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:14,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252269443] [2022-12-13 15:21:14,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252269443] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:14,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:14,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:21:14,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825818643] [2022-12-13 15:21:14,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:21:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:14,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:21:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:21:14,037 INFO L87 Difference]: Start difference. First operand 602 states and 885 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:15,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:15,035 INFO L93 Difference]: Finished difference Result 920 states and 1318 transitions. [2022-12-13 15:21:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:21:15,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-12-13 15:21:15,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:15,038 INFO L225 Difference]: With dead ends: 920 [2022-12-13 15:21:15,038 INFO L226 Difference]: Without dead ends: 648 [2022-12-13 15:21:15,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:21:15,040 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 539 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 1676 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:15,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 2453 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1676 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:21:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-12-13 15:21:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 617. [2022-12-13 15:21:15,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 519 states have (on average 1.4739884393063585) internal successors, (765), 528 states have internal predecessors, (765), 61 states have call successors, (61), 29 states have call predecessors, (61), 35 states have return successors, (74), 63 states have call predecessors, (74), 57 states have call successors, (74) [2022-12-13 15:21:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 900 transitions. [2022-12-13 15:21:15,063 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 900 transitions. Word has length 65 [2022-12-13 15:21:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:15,064 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 900 transitions. [2022-12-13 15:21:15,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 900 transitions. [2022-12-13 15:21:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 15:21:15,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:15,065 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:15,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:21:15,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:15,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:15,066 INFO L85 PathProgramCache]: Analyzing trace with hash -357908203, now seen corresponding path program 1 times [2022-12-13 15:21:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:15,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649048583] [2022-12-13 15:21:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:15,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:15,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649048583] [2022-12-13 15:21:15,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649048583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:15,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:15,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:21:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535926280] [2022-12-13 15:21:15,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:21:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:15,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:21:15,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:21:15,197 INFO L87 Difference]: Start difference. First operand 617 states and 900 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) [2022-12-13 15:21:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:16,078 INFO L93 Difference]: Finished difference Result 1009 states and 1411 transitions. [2022-12-13 15:21:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:21:16,078 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 [2022-12-13 15:21:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:16,081 INFO L225 Difference]: With dead ends: 1009 [2022-12-13 15:21:16,081 INFO L226 Difference]: Without dead ends: 724 [2022-12-13 15:21:16,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:21:16,082 INFO L413 NwaCegarLoop]: 351 mSDtfsCounter, 1212 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1843 SdHoareTripleChecker+Invalid, 1586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:16,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 1843 Invalid, 1586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 15:21:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-12-13 15:21:16,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 629. [2022-12-13 15:21:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 529 states have (on average 1.4650283553875236) internal successors, (775), 538 states have internal predecessors, (775), 62 states have call successors, (62), 30 states have call predecessors, (62), 36 states have return successors, (73), 64 states have call predecessors, (73), 58 states have call successors, (73) [2022-12-13 15:21:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 910 transitions. [2022-12-13 15:21:16,108 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 910 transitions. Word has length 65 [2022-12-13 15:21:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:16,108 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 910 transitions. [2022-12-13 15:21:16,109 INFO L496 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) [2022-12-13 15:21:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 910 transitions. [2022-12-13 15:21:16,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 15:21:16,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:16,110 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:16,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:21:16,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:16,111 INFO L85 PathProgramCache]: Analyzing trace with hash -491921709, now seen corresponding path program 1 times [2022-12-13 15:21:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:16,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944646463] [2022-12-13 15:21:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:16,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944646463] [2022-12-13 15:21:16,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944646463] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:16,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:16,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:16,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442967499] [2022-12-13 15:21:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:16,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:16,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:16,189 INFO L87 Difference]: Start difference. First operand 629 states and 910 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 15:21:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:16,822 INFO L93 Difference]: Finished difference Result 1271 states and 1757 transitions. [2022-12-13 15:21:16,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 15:21:16,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-12-13 15:21:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:16,827 INFO L225 Difference]: With dead ends: 1271 [2022-12-13 15:21:16,827 INFO L226 Difference]: Without dead ends: 975 [2022-12-13 15:21:16,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:21:16,829 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 1482 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:16,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1512 Valid, 1226 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:21:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-12-13 15:21:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 919. [2022-12-13 15:21:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 753 states have (on average 1.4103585657370519) internal successors, (1062), 769 states have internal predecessors, (1062), 97 states have call successors, (97), 52 states have call predecessors, (97), 67 states have return successors, (130), 104 states have call predecessors, (130), 93 states have call successors, (130) [2022-12-13 15:21:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1289 transitions. [2022-12-13 15:21:16,891 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1289 transitions. Word has length 65 [2022-12-13 15:21:16,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:16,892 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1289 transitions. [2022-12-13 15:21:16,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 15:21:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1289 transitions. [2022-12-13 15:21:16,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 15:21:16,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:16,894 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:16,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:21:16,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:16,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:16,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1681946624, now seen corresponding path program 1 times [2022-12-13 15:21:16,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754192034] [2022-12-13 15:21:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:16,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:16,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:16,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754192034] [2022-12-13 15:21:16,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754192034] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:16,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:16,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:21:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261836504] [2022-12-13 15:21:16,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:16,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:16,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:21:16,967 INFO L87 Difference]: Start difference. First operand 919 states and 1289 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:17,552 INFO L93 Difference]: Finished difference Result 2122 states and 2860 transitions. [2022-12-13 15:21:17,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:21:17,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-12-13 15:21:17,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:17,559 INFO L225 Difference]: With dead ends: 2122 [2022-12-13 15:21:17,559 INFO L226 Difference]: Without dead ends: 1515 [2022-12-13 15:21:17,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:21:17,562 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1024 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:17,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 1195 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 15:21:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-12-13 15:21:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1400. [2022-12-13 15:21:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1400 states, 1132 states have (on average 1.3630742049469964) internal successors, (1543), 1151 states have internal predecessors, (1543), 142 states have call successors, (142), 96 states have call predecessors, (142), 124 states have return successors, (202), 159 states have call predecessors, (202), 138 states have call successors, (202) [2022-12-13 15:21:17,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1400 states to 1400 states and 1887 transitions. [2022-12-13 15:21:17,646 INFO L78 Accepts]: Start accepts. Automaton has 1400 states and 1887 transitions. Word has length 66 [2022-12-13 15:21:17,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:17,647 INFO L495 AbstractCegarLoop]: Abstraction has 1400 states and 1887 transitions. [2022-12-13 15:21:17,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:17,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1400 states and 1887 transitions. [2022-12-13 15:21:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 15:21:17,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:17,649 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:17,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:21:17,649 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:17,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:17,649 INFO L85 PathProgramCache]: Analyzing trace with hash -223706965, now seen corresponding path program 1 times [2022-12-13 15:21:17,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:17,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265638958] [2022-12-13 15:21:17,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:17,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:17,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:17,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265638958] [2022-12-13 15:21:17,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265638958] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:17,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:17,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:21:17,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836618057] [2022-12-13 15:21:17,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:17,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:17,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:17,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:21:17,709 INFO L87 Difference]: Start difference. First operand 1400 states and 1887 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:18,251 INFO L93 Difference]: Finished difference Result 3588 states and 4693 transitions. [2022-12-13 15:21:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:21:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-12-13 15:21:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:18,262 INFO L225 Difference]: With dead ends: 3588 [2022-12-13 15:21:18,262 INFO L226 Difference]: Without dead ends: 2520 [2022-12-13 15:21:18,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:21:18,265 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 1184 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:18,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 1230 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:21:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-12-13 15:21:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 2262. [2022-12-13 15:21:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 1798 states have (on average 1.318131256952169) internal successors, (2370), 1827 states have internal predecessors, (2370), 240 states have call successors, (240), 180 states have call predecessors, (240), 222 states have return successors, (338), 261 states have call predecessors, (338), 236 states have call successors, (338) [2022-12-13 15:21:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 2948 transitions. [2022-12-13 15:21:18,364 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 2948 transitions. Word has length 66 [2022-12-13 15:21:18,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:18,364 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 2948 transitions. [2022-12-13 15:21:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 2948 transitions. [2022-12-13 15:21:18,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 15:21:18,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:18,366 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:18,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:21:18,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1790634273, now seen corresponding path program 1 times [2022-12-13 15:21:18,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:18,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87768884] [2022-12-13 15:21:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:18,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:18,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:18,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87768884] [2022-12-13 15:21:18,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87768884] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:18,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:18,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:21:18,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907406299] [2022-12-13 15:21:18,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:18,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:18,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:21:18,423 INFO L87 Difference]: Start difference. First operand 2262 states and 2948 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:18,965 INFO L93 Difference]: Finished difference Result 5172 states and 6598 transitions. [2022-12-13 15:21:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:21:18,966 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2022-12-13 15:21:18,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:18,975 INFO L225 Difference]: With dead ends: 5172 [2022-12-13 15:21:18,975 INFO L226 Difference]: Without dead ends: 3242 [2022-12-13 15:21:18,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:21:18,979 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 1169 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:18,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1199 Valid, 1275 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:21:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2022-12-13 15:21:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2994. [2022-12-13 15:21:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2366 states have (on average 1.2992392223161453) internal successors, (3074), 2403 states have internal predecessors, (3074), 320 states have call successors, (320), 250 states have call predecessors, (320), 306 states have return successors, (447), 347 states have call predecessors, (447), 316 states have call successors, (447) [2022-12-13 15:21:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3841 transitions. [2022-12-13 15:21:19,116 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3841 transitions. Word has length 72 [2022-12-13 15:21:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:19,117 INFO L495 AbstractCegarLoop]: Abstraction has 2994 states and 3841 transitions. [2022-12-13 15:21:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 15:21:19,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3841 transitions. [2022-12-13 15:21:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 15:21:19,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:19,119 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:19,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:21:19,119 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:19,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:19,120 INFO L85 PathProgramCache]: Analyzing trace with hash -191825039, now seen corresponding path program 1 times [2022-12-13 15:21:19,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:19,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657048484] [2022-12-13 15:21:19,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:19,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:19,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:19,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657048484] [2022-12-13 15:21:19,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657048484] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:19,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:19,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:19,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637599700] [2022-12-13 15:21:19,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:19,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:19,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:19,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:19,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:19,188 INFO L87 Difference]: Start difference. First operand 2994 states and 3841 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-13 15:21:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:19,845 INFO L93 Difference]: Finished difference Result 3768 states and 4772 transitions. [2022-12-13 15:21:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:21:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-12-13 15:21:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:19,853 INFO L225 Difference]: With dead ends: 3768 [2022-12-13 15:21:19,853 INFO L226 Difference]: Without dead ends: 3765 [2022-12-13 15:21:19,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:21:19,854 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 1773 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:19,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1783 Valid, 1249 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:21:19,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2022-12-13 15:21:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 3488. [2022-12-13 15:21:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3488 states, 2751 states have (on average 1.2889858233369684) internal successors, (3546), 2793 states have internal predecessors, (3546), 370 states have call successors, (370), 294 states have call predecessors, (370), 365 states have return successors, (526), 407 states have call predecessors, (526), 367 states have call successors, (526) [2022-12-13 15:21:20,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3488 states to 3488 states and 4442 transitions. [2022-12-13 15:21:20,020 INFO L78 Accepts]: Start accepts. Automaton has 3488 states and 4442 transitions. Word has length 73 [2022-12-13 15:21:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:20,021 INFO L495 AbstractCegarLoop]: Abstraction has 3488 states and 4442 transitions. [2022-12-13 15:21:20,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-13 15:21:20,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3488 states and 4442 transitions. [2022-12-13 15:21:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 15:21:20,022 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:20,022 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:20,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:21:20,022 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:20,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:20,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1652850327, now seen corresponding path program 1 times [2022-12-13 15:21:20,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:20,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707162591] [2022-12-13 15:21:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:20,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:20,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707162591] [2022-12-13 15:21:20,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707162591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:21:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353450362] [2022-12-13 15:21:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:20,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:21:20,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:21:20,137 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:21:20,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:21:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:21:20,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:21:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:20,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:21:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:20,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353450362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:21:20,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:21:20,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2022-12-13 15:21:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356049407] [2022-12-13 15:21:20,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:21:20,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:21:20,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:21:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:21:20,604 INFO L87 Difference]: Start difference. First operand 3488 states and 4442 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-13 15:21:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:22,244 INFO L93 Difference]: Finished difference Result 7929 states and 9928 transitions. [2022-12-13 15:21:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:21:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2022-12-13 15:21:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:22,262 INFO L225 Difference]: With dead ends: 7929 [2022-12-13 15:21:22,262 INFO L226 Difference]: Without dead ends: 7926 [2022-12-13 15:21:22,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-12-13 15:21:22,264 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 2186 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2255 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 2107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:22,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2255 Valid, 2229 Invalid, 2107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 15:21:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2022-12-13 15:21:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 5278. [2022-12-13 15:21:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 4155 states have (on average 1.2808664259927798) internal successors, (5322), 4219 states have internal predecessors, (5322), 554 states have call successors, (554), 452 states have call predecessors, (554), 567 states have return successors, (804), 613 states have call predecessors, (804), 551 states have call successors, (804) [2022-12-13 15:21:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 6680 transitions. [2022-12-13 15:21:22,616 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 6680 transitions. Word has length 74 [2022-12-13 15:21:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:22,616 INFO L495 AbstractCegarLoop]: Abstraction has 5278 states and 6680 transitions. [2022-12-13 15:21:22,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-12-13 15:21:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 6680 transitions. [2022-12-13 15:21:22,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 15:21:22,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:22,618 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:22,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:21:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:21:22,819 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:22,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash 304935921, now seen corresponding path program 2 times [2022-12-13 15:21:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310191528] [2022-12-13 15:21:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:22,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:22,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:22,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310191528] [2022-12-13 15:21:22,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310191528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:22,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:22,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:21:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453960802] [2022-12-13 15:21:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:22,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:21:22,895 INFO L87 Difference]: Start difference. First operand 5278 states and 6680 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-13 15:21:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:23,637 INFO L93 Difference]: Finished difference Result 7960 states and 10053 transitions. [2022-12-13 15:21:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:21:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-12-13 15:21:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:23,648 INFO L225 Difference]: With dead ends: 7960 [2022-12-13 15:21:23,648 INFO L226 Difference]: Without dead ends: 3885 [2022-12-13 15:21:23,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:21:23,653 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1089 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:23,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1122 Valid, 1356 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:21:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2022-12-13 15:21:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3650. [2022-12-13 15:21:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 2883 states have (on average 1.2702046479361775) internal successors, (3662), 2925 states have internal predecessors, (3662), 386 states have call successors, (386), 308 states have call predecessors, (386), 379 states have return successors, (530), 423 states have call predecessors, (530), 383 states have call successors, (530) [2022-12-13 15:21:23,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 4578 transitions. [2022-12-13 15:21:23,847 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 4578 transitions. Word has length 77 [2022-12-13 15:21:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:23,847 INFO L495 AbstractCegarLoop]: Abstraction has 3650 states and 4578 transitions. [2022-12-13 15:21:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-13 15:21:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 4578 transitions. [2022-12-13 15:21:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 15:21:23,849 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:23,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:23,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:21:23,850 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash -385956453, now seen corresponding path program 1 times [2022-12-13 15:21:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:23,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930414663] [2022-12-13 15:21:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:23,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 15:21:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:21:23,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930414663] [2022-12-13 15:21:23,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930414663] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:23,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:23,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:21:23,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872375119] [2022-12-13 15:21:23,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:23,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:21:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:21:23,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:21:23,950 INFO L87 Difference]: Start difference. First operand 3650 states and 4578 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 15:21:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:25,188 INFO L93 Difference]: Finished difference Result 10522 states and 12995 transitions. [2022-12-13 15:21:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 15:21:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-12-13 15:21:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:25,202 INFO L225 Difference]: With dead ends: 10522 [2022-12-13 15:21:25,202 INFO L226 Difference]: Without dead ends: 5885 [2022-12-13 15:21:25,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:21:25,208 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 1570 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:25,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1586 Valid, 1622 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 15:21:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2022-12-13 15:21:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5565. [2022-12-13 15:21:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5565 states, 4341 states have (on average 1.2404975812024879) internal successors, (5385), 4426 states have internal predecessors, (5385), 590 states have call successors, (590), 482 states have call predecessors, (590), 632 states have return successors, (912), 663 states have call predecessors, (912), 587 states have call successors, (912) [2022-12-13 15:21:25,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5565 states to 5565 states and 6887 transitions. [2022-12-13 15:21:25,497 INFO L78 Accepts]: Start accepts. Automaton has 5565 states and 6887 transitions. Word has length 84 [2022-12-13 15:21:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:25,497 INFO L495 AbstractCegarLoop]: Abstraction has 5565 states and 6887 transitions. [2022-12-13 15:21:25,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-12-13 15:21:25,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5565 states and 6887 transitions. [2022-12-13 15:21:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 15:21:25,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:25,500 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:21:25,501 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:25,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1773640047, now seen corresponding path program 1 times [2022-12-13 15:21:25,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:25,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998282542] [2022-12-13 15:21:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:25,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-12-13 15:21:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 15:21:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:25,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998282542] [2022-12-13 15:21:25,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998282542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:25,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:25,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:21:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795643987] [2022-12-13 15:21:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:21:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:21:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:21:25,597 INFO L87 Difference]: Start difference. First operand 5565 states and 6887 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) [2022-12-13 15:21:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:26,859 INFO L93 Difference]: Finished difference Result 9568 states and 11727 transitions. [2022-12-13 15:21:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:21:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2022-12-13 15:21:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:26,869 INFO L225 Difference]: With dead ends: 9568 [2022-12-13 15:21:26,869 INFO L226 Difference]: Without dead ends: 4975 [2022-12-13 15:21:26,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:21:26,875 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 2154 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1618 mSolverCounterSat, 385 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2197 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 2003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 385 IncrementalHoareTripleChecker+Valid, 1618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:26,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2197 Valid, 1935 Invalid, 2003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [385 Valid, 1618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 15:21:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4975 states. [2022-12-13 15:21:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4975 to 4641. [2022-12-13 15:21:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 3630 states have (on average 1.2352617079889807) internal successors, (4484), 3697 states have internal predecessors, (4484), 491 states have call successors, (491), 397 states have call predecessors, (491), 518 states have return successors, (690), 553 states have call predecessors, (690), 488 states have call successors, (690) [2022-12-13 15:21:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 5665 transitions. [2022-12-13 15:21:27,126 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 5665 transitions. Word has length 93 [2022-12-13 15:21:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:27,126 INFO L495 AbstractCegarLoop]: Abstraction has 4641 states and 5665 transitions. [2022-12-13 15:21:27,126 INFO L496 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) [2022-12-13 15:21:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 5665 transitions. [2022-12-13 15:21:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-13 15:21:27,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:27,130 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 15:21:27,130 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:27,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1026333805, now seen corresponding path program 1 times [2022-12-13 15:21:27,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:27,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049800284] [2022-12-13 15:21:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:27,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 15:21:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-12-13 15:21:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-12-13 15:21:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-12-13 15:21:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-12-13 15:21:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-12-13 15:21:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,250 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 15:21:27,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:27,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049800284] [2022-12-13 15:21:27,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049800284] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:21:27,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992549468] [2022-12-13 15:21:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:27,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:21:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:21:27,252 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:21:27,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:21:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:21:27,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:21:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 15:21:27,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:21:27,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992549468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:27,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:21:27,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-12-13 15:21:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858871294] [2022-12-13 15:21:27,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:27,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:27,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:21:27,384 INFO L87 Difference]: Start difference. First operand 4641 states and 5665 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-13 15:21:27,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:27,552 INFO L93 Difference]: Finished difference Result 6807 states and 8288 transitions. [2022-12-13 15:21:27,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:21:27,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2022-12-13 15:21:27,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:27,560 INFO L225 Difference]: With dead ends: 6807 [2022-12-13 15:21:27,561 INFO L226 Difference]: Without dead ends: 2502 [2022-12-13 15:21:27,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 15:21:27,568 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 34 mSDsluCounter, 2412 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:27,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3025 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:21:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2022-12-13 15:21:27,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2377. [2022-12-13 15:21:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 1943 states have (on average 1.2506433350488935) internal successors, (2430), 1959 states have internal predecessors, (2430), 215 states have call successors, (215), 163 states have call predecessors, (215), 217 states have return successors, (297), 255 states have call predecessors, (297), 212 states have call successors, (297) [2022-12-13 15:21:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 2942 transitions. [2022-12-13 15:21:27,732 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 2942 transitions. Word has length 145 [2022-12-13 15:21:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:27,732 INFO L495 AbstractCegarLoop]: Abstraction has 2377 states and 2942 transitions. [2022-12-13 15:21:27,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-13 15:21:27,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 2942 transitions. [2022-12-13 15:21:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-13 15:21:27,735 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:27,735 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:21:27,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:21:27,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41d308d5-e87e-42ec-b128-9dfb89fc2731/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 15:21:27,935 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1451779089, now seen corresponding path program 1 times [2022-12-13 15:21:27,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:27,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501891603] [2022-12-13 15:21:27,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:27,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 15:21:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 15:21:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 15:21:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 15:21:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 15:21:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-12-13 15:21:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 15:21:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-12-13 15:21:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 15:21:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 15:21:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-12-13 15:21:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-12-13 15:21:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:27,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-12-13 15:21:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-13 15:21:28,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:28,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501891603] [2022-12-13 15:21:28,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501891603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:28,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:28,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:21:28,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114732440] [2022-12-13 15:21:28,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:28,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:28,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:28,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:28,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:21:28,003 INFO L87 Difference]: Start difference. First operand 2377 states and 2942 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-13 15:21:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:28,568 INFO L93 Difference]: Finished difference Result 2442 states and 3010 transitions. [2022-12-13 15:21:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:21:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2022-12-13 15:21:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:28,573 INFO L225 Difference]: With dead ends: 2442 [2022-12-13 15:21:28,573 INFO L226 Difference]: Without dead ends: 1999 [2022-12-13 15:21:28,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:21:28,574 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 637 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:28,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1414 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:21:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2022-12-13 15:21:28,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1937. [2022-12-13 15:21:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1599 states have (on average 1.2670419011882426) internal successors, (2026), 1612 states have internal predecessors, (2026), 169 states have call successors, (169), 123 states have call predecessors, (169), 167 states have return successors, (233), 202 states have call predecessors, (233), 166 states have call successors, (233) [2022-12-13 15:21:28,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2428 transitions. [2022-12-13 15:21:28,715 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2428 transitions. Word has length 147 [2022-12-13 15:21:28,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:28,715 INFO L495 AbstractCegarLoop]: Abstraction has 1937 states and 2428 transitions. [2022-12-13 15:21:28,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-13 15:21:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2428 transitions. [2022-12-13 15:21:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:28,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:28,719 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:28,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:21:28,719 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:28,719 INFO L85 PathProgramCache]: Analyzing trace with hash 835864378, now seen corresponding path program 1 times [2022-12-13 15:21:28,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:28,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749174356] [2022-12-13 15:21:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:28,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:28,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:28,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:28,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749174356] [2022-12-13 15:21:28,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749174356] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:28,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:28,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:21:28,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921248989] [2022-12-13 15:21:28,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:28,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:21:28,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:28,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:21:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:21:28,829 INFO L87 Difference]: Start difference. First operand 1937 states and 2428 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) [2022-12-13 15:21:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:30,292 INFO L93 Difference]: Finished difference Result 2347 states and 3088 transitions. [2022-12-13 15:21:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:21:30,292 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 [2022-12-13 15:21:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:30,297 INFO L225 Difference]: With dead ends: 2347 [2022-12-13 15:21:30,297 INFO L226 Difference]: Without dead ends: 2046 [2022-12-13 15:21:30,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:21:30,298 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 923 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:30,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 857 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 15:21:30,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2022-12-13 15:21:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1937. [2022-12-13 15:21:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1599 states have (on average 1.2664165103189493) internal successors, (2025), 1612 states have internal predecessors, (2025), 169 states have call successors, (169), 123 states have call predecessors, (169), 167 states have return successors, (233), 202 states have call predecessors, (233), 166 states have call successors, (233) [2022-12-13 15:21:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2427 transitions. [2022-12-13 15:21:30,463 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2427 transitions. Word has length 146 [2022-12-13 15:21:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:30,463 INFO L495 AbstractCegarLoop]: Abstraction has 1937 states and 2427 transitions. [2022-12-13 15:21:30,464 INFO L496 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) [2022-12-13 15:21:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2427 transitions. [2022-12-13 15:21:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:30,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:30,465 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:30,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:21:30,466 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash 417975676, now seen corresponding path program 1 times [2022-12-13 15:21:30,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:30,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486288650] [2022-12-13 15:21:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:30,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:30,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:30,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:30,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:30,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:30,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:30,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486288650] [2022-12-13 15:21:30,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486288650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:30,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:30,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 15:21:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646352497] [2022-12-13 15:21:30,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:21:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:21:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:21:30,605 INFO L87 Difference]: Start difference. First operand 1937 states and 2427 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) [2022-12-13 15:21:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:32,969 INFO L93 Difference]: Finished difference Result 2751 states and 3738 transitions. [2022-12-13 15:21:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:21:32,970 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 [2022-12-13 15:21:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:32,974 INFO L225 Difference]: With dead ends: 2751 [2022-12-13 15:21:32,974 INFO L226 Difference]: Without dead ends: 2459 [2022-12-13 15:21:32,975 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:21:32,975 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 1453 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2012 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1479 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:32,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1479 Valid, 1305 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2012 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 15:21:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-12-13 15:21:33,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2240. [2022-12-13 15:21:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 1877 states have (on average 1.3148641449120937) internal successors, (2468), 1891 states have internal predecessors, (2468), 187 states have call successors, (187), 129 states have call predecessors, (187), 174 states have return successors, (254), 220 states have call predecessors, (254), 184 states have call successors, (254) [2022-12-13 15:21:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 2909 transitions. [2022-12-13 15:21:33,177 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 2909 transitions. Word has length 146 [2022-12-13 15:21:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:33,177 INFO L495 AbstractCegarLoop]: Abstraction has 2240 states and 2909 transitions. [2022-12-13 15:21:33,177 INFO L496 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) [2022-12-13 15:21:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 2909 transitions. [2022-12-13 15:21:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:33,180 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:33,180 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:33,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:21:33,180 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1383489928, now seen corresponding path program 1 times [2022-12-13 15:21:33,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:33,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411408012] [2022-12-13 15:21:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:33,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:33,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:33,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:33,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:33,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:33,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:33,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411408012] [2022-12-13 15:21:33,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411408012] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:33,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:33,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:33,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294229730] [2022-12-13 15:21:33,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:33,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:33,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:33,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:33,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:33,346 INFO L87 Difference]: Start difference. First operand 2240 states and 2909 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) [2022-12-13 15:21:36,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:36,088 INFO L93 Difference]: Finished difference Result 3479 states and 4905 transitions. [2022-12-13 15:21:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:21:36,089 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 [2022-12-13 15:21:36,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:36,094 INFO L225 Difference]: With dead ends: 3479 [2022-12-13 15:21:36,094 INFO L226 Difference]: Without dead ends: 2884 [2022-12-13 15:21:36,095 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:21:36,096 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 1551 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 2746 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1577 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:36,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1577 Valid, 1655 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2746 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 15:21:36,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-12-13 15:21:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2522. [2022-12-13 15:21:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2134 states have (on average 1.344423617619494) internal successors, (2869), 2149 states have internal predecessors, (2869), 205 states have call successors, (205), 135 states have call predecessors, (205), 181 states have return successors, (274), 239 states have call predecessors, (274), 202 states have call successors, (274) [2022-12-13 15:21:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 3348 transitions. [2022-12-13 15:21:36,325 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 3348 transitions. Word has length 146 [2022-12-13 15:21:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:36,325 INFO L495 AbstractCegarLoop]: Abstraction has 2522 states and 3348 transitions. [2022-12-13 15:21:36,325 INFO L496 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) [2022-12-13 15:21:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 3348 transitions. [2022-12-13 15:21:36,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:36,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:36,327 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:36,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 15:21:36,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:36,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:36,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2090086534, now seen corresponding path program 1 times [2022-12-13 15:21:36,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:36,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785604154] [2022-12-13 15:21:36,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:36,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:36,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:36,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:36,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:36,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:36,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:36,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:36,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785604154] [2022-12-13 15:21:36,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785604154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:36,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:36,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:36,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978379184] [2022-12-13 15:21:36,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:36,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:36,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:36,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:36,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:36,470 INFO L87 Difference]: Start difference. First operand 2522 states and 3348 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) [2022-12-13 15:21:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:39,496 INFO L93 Difference]: Finished difference Result 4552 states and 6612 transitions. [2022-12-13 15:21:39,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:21:39,496 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 [2022-12-13 15:21:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:39,502 INFO L225 Difference]: With dead ends: 4552 [2022-12-13 15:21:39,502 INFO L226 Difference]: Without dead ends: 3675 [2022-12-13 15:21:39,505 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:21:39,505 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1478 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:39,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1504 Valid, 2305 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3026 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-13 15:21:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2022-12-13 15:21:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3087. [2022-12-13 15:21:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3087 states, 2649 states have (on average 1.3861834654586636) internal successors, (3672), 2666 states have internal predecessors, (3672), 241 states have call successors, (241), 147 states have call predecessors, (241), 195 states have return successors, (318), 277 states have call predecessors, (318), 238 states have call successors, (318) [2022-12-13 15:21:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3087 states to 3087 states and 4231 transitions. [2022-12-13 15:21:39,806 INFO L78 Accepts]: Start accepts. Automaton has 3087 states and 4231 transitions. Word has length 146 [2022-12-13 15:21:39,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:39,806 INFO L495 AbstractCegarLoop]: Abstraction has 3087 states and 4231 transitions. [2022-12-13 15:21:39,806 INFO L496 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) [2022-12-13 15:21:39,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3087 states and 4231 transitions. [2022-12-13 15:21:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:39,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:39,809 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:39,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 15:21:39,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:39,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1143048648, now seen corresponding path program 1 times [2022-12-13 15:21:39,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:39,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005722763] [2022-12-13 15:21:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:39,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:39,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:39,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:39,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:39,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:39,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:39,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005722763] [2022-12-13 15:21:39,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005722763] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:39,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:39,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:39,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484544722] [2022-12-13 15:21:39,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:39,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:39,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:39,964 INFO L87 Difference]: Start difference. First operand 3087 states and 4231 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) [2022-12-13 15:21:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:42,721 INFO L93 Difference]: Finished difference Result 6617 states and 9879 transitions. [2022-12-13 15:21:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:21:42,722 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 [2022-12-13 15:21:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:42,729 INFO L225 Difference]: With dead ends: 6617 [2022-12-13 15:21:42,729 INFO L226 Difference]: Without dead ends: 5175 [2022-12-13 15:21:42,732 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:21:42,732 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1470 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 3023 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 3120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:42,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1496 Valid, 2305 Invalid, 3120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3023 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 15:21:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2022-12-13 15:21:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 4218. [2022-12-13 15:21:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4218 states, 3680 states have (on average 1.4342391304347826) internal successors, (5278), 3701 states have internal predecessors, (5278), 313 states have call successors, (313), 171 states have call predecessors, (313), 223 states have return successors, (412), 353 states have call predecessors, (412), 310 states have call successors, (412) [2022-12-13 15:21:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4218 states to 4218 states and 6003 transitions. [2022-12-13 15:21:43,124 INFO L78 Accepts]: Start accepts. Automaton has 4218 states and 6003 transitions. Word has length 146 [2022-12-13 15:21:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:43,124 INFO L495 AbstractCegarLoop]: Abstraction has 4218 states and 6003 transitions. [2022-12-13 15:21:43,125 INFO L496 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) [2022-12-13 15:21:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 4218 states and 6003 transitions. [2022-12-13 15:21:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:43,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:43,127 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:43,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 15:21:43,127 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:43,128 INFO L85 PathProgramCache]: Analyzing trace with hash -281215046, now seen corresponding path program 1 times [2022-12-13 15:21:43,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:43,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335946453] [2022-12-13 15:21:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:43,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:43,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:43,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:43,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:43,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335946453] [2022-12-13 15:21:43,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335946453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:43,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:43,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008604049] [2022-12-13 15:21:43,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:43,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:43,262 INFO L87 Difference]: Start difference. First operand 4218 states and 6003 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) [2022-12-13 15:21:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:46,448 INFO L93 Difference]: Finished difference Result 10746 states and 16429 transitions. [2022-12-13 15:21:46,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:21:46,448 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 [2022-12-13 15:21:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:46,466 INFO L225 Difference]: With dead ends: 10746 [2022-12-13 15:21:46,466 INFO L226 Difference]: Without dead ends: 8173 [2022-12-13 15:21:46,473 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:21:46,474 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1466 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 3014 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 3111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 3014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:46,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 2305 Invalid, 3111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 3014 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 15:21:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8173 states. [2022-12-13 15:21:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8173 to 6485. [2022-12-13 15:21:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 5747 states have (on average 1.4783365234035148) internal successors, (8496), 5776 states have internal predecessors, (8496), 457 states have call successors, (457), 219 states have call predecessors, (457), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2022-12-13 15:21:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 9571 transitions. [2022-12-13 15:21:47,141 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 9571 transitions. Word has length 146 [2022-12-13 15:21:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:47,141 INFO L495 AbstractCegarLoop]: Abstraction has 6485 states and 9571 transitions. [2022-12-13 15:21:47,141 INFO L496 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) [2022-12-13 15:21:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 9571 transitions. [2022-12-13 15:21:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:47,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:47,144 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:47,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 15:21:47,144 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1963343352, now seen corresponding path program 1 times [2022-12-13 15:21:47,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:47,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616099664] [2022-12-13 15:21:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:47,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:47,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:47,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:47,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:47,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:47,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:47,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:47,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616099664] [2022-12-13 15:21:47,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616099664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:47,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969101117] [2022-12-13 15:21:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:47,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:47,251 INFO L87 Difference]: Start difference. First operand 6485 states and 9571 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) [2022-12-13 15:21:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:49,254 INFO L93 Difference]: Finished difference Result 13089 states and 20218 transitions. [2022-12-13 15:21:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:21:49,255 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 [2022-12-13 15:21:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:49,269 INFO L225 Difference]: With dead ends: 13089 [2022-12-13 15:21:49,269 INFO L226 Difference]: Without dead ends: 8249 [2022-12-13 15:21:49,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:21:49,278 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1311 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 1581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:49,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1338 Valid, 1079 Invalid, 1581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 15:21:49,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8249 states. [2022-12-13 15:21:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8249 to 6485. [2022-12-13 15:21:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 5747 states have (on average 1.4753784583260832) internal successors, (8479), 5776 states have internal predecessors, (8479), 457 states have call successors, (457), 219 states have call predecessors, (457), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2022-12-13 15:21:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 9554 transitions. [2022-12-13 15:21:49,942 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 9554 transitions. Word has length 146 [2022-12-13 15:21:49,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:49,942 INFO L495 AbstractCegarLoop]: Abstraction has 6485 states and 9554 transitions. [2022-12-13 15:21:49,942 INFO L496 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) [2022-12-13 15:21:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 9554 transitions. [2022-12-13 15:21:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:49,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:49,945 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:49,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 15:21:49,945 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:49,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1843576838, now seen corresponding path program 1 times [2022-12-13 15:21:49,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:49,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186763303] [2022-12-13 15:21:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:49,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:49,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:50,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:50,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:50,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:50,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:50,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:50,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186763303] [2022-12-13 15:21:50,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186763303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:50,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:50,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681858618] [2022-12-13 15:21:50,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:50,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:50,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:50,054 INFO L87 Difference]: Start difference. First operand 6485 states and 9554 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) [2022-12-13 15:21:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:52,330 INFO L93 Difference]: Finished difference Result 13071 states and 20132 transitions. [2022-12-13 15:21:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:21:52,331 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 [2022-12-13 15:21:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:52,345 INFO L225 Difference]: With dead ends: 13071 [2022-12-13 15:21:52,345 INFO L226 Difference]: Without dead ends: 8231 [2022-12-13 15:21:52,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:21:52,353 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 1131 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:52,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 1295 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 15:21:52,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8231 states. [2022-12-13 15:21:53,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8231 to 6485. [2022-12-13 15:21:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6485 states, 5747 states have (on average 1.4724203932486515) internal successors, (8462), 5776 states have internal predecessors, (8462), 457 states have call successors, (457), 219 states have call predecessors, (457), 279 states have return successors, (618), 505 states have call predecessors, (618), 454 states have call successors, (618) [2022-12-13 15:21:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 9537 transitions. [2022-12-13 15:21:53,081 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 9537 transitions. Word has length 146 [2022-12-13 15:21:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:53,081 INFO L495 AbstractCegarLoop]: Abstraction has 6485 states and 9537 transitions. [2022-12-13 15:21:53,081 INFO L496 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) [2022-12-13 15:21:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 9537 transitions. [2022-12-13 15:21:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:53,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:53,085 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:53,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 15:21:53,085 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1358755256, now seen corresponding path program 1 times [2022-12-13 15:21:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:53,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686213415] [2022-12-13 15:21:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:53,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:53,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:53,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:53,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:53,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:53,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:53,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:53,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:53,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686213415] [2022-12-13 15:21:53,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686213415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:53,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:53,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904608966] [2022-12-13 15:21:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:53,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:53,240 INFO L87 Difference]: Start difference. First operand 6485 states and 9537 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) [2022-12-13 15:21:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:21:57,396 INFO L93 Difference]: Finished difference Result 18948 states and 29315 transitions. [2022-12-13 15:21:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:21:57,396 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 [2022-12-13 15:21:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:21:57,422 INFO L225 Difference]: With dead ends: 18948 [2022-12-13 15:21:57,422 INFO L226 Difference]: Without dead ends: 14108 [2022-12-13 15:21:57,430 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:21:57,431 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 1452 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 2933 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 2305 SdHoareTripleChecker+Invalid, 3030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:21:57,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1478 Valid, 2305 Invalid, 3030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2933 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-13 15:21:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14108 states. [2022-12-13 15:21:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14108 to 11081. [2022-12-13 15:21:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11081 states, 9943 states have (on average 1.5037714975359548) internal successors, (14952), 9988 states have internal predecessors, (14952), 745 states have call successors, (745), 315 states have call predecessors, (745), 391 states have return successors, (1084), 809 states have call predecessors, (1084), 742 states have call successors, (1084) [2022-12-13 15:21:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11081 states to 11081 states and 16781 transitions. [2022-12-13 15:21:58,750 INFO L78 Accepts]: Start accepts. Automaton has 11081 states and 16781 transitions. Word has length 146 [2022-12-13 15:21:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:21:58,750 INFO L495 AbstractCegarLoop]: Abstraction has 11081 states and 16781 transitions. [2022-12-13 15:21:58,750 INFO L496 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) [2022-12-13 15:21:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 11081 states and 16781 transitions. [2022-12-13 15:21:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:21:58,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:21:58,755 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:21:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 15:21:58,755 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:21:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:21:58,755 INFO L85 PathProgramCache]: Analyzing trace with hash -483720458, now seen corresponding path program 1 times [2022-12-13 15:21:58,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:21:58,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945502258] [2022-12-13 15:21:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:21:58,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:21:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:58,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:21:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:21:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:58,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:21:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:58,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:21:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:58,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:21:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:21:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:21:58,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:21:58,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945502258] [2022-12-13 15:21:58,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945502258] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:21:58,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:21:58,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:21:58,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983823677] [2022-12-13 15:21:58,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:21:58,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:21:58,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:21:58,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:21:58,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:21:58,865 INFO L87 Difference]: Start difference. First operand 11081 states and 16781 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) [2022-12-13 15:22:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:22:02,017 INFO L93 Difference]: Finished difference Result 23681 states and 37040 transitions. [2022-12-13 15:22:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:22:02,017 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 [2022-12-13 15:22:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:22:02,044 INFO L225 Difference]: With dead ends: 23681 [2022-12-13 15:22:02,044 INFO L226 Difference]: Without dead ends: 14245 [2022-12-13 15:22:02,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:22:02,058 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 1171 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1198 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:22:02,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1198 Valid, 1294 Invalid, 1562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 15:22:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14245 states. [2022-12-13 15:22:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14245 to 11081. [2022-12-13 15:22:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11081 states, 9943 states have (on average 1.5004525797043147) internal successors, (14919), 9988 states have internal predecessors, (14919), 745 states have call successors, (745), 315 states have call predecessors, (745), 391 states have return successors, (1084), 809 states have call predecessors, (1084), 742 states have call successors, (1084) [2022-12-13 15:22:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11081 states to 11081 states and 16748 transitions. [2022-12-13 15:22:03,332 INFO L78 Accepts]: Start accepts. Automaton has 11081 states and 16748 transitions. Word has length 146 [2022-12-13 15:22:03,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:22:03,333 INFO L495 AbstractCegarLoop]: Abstraction has 11081 states and 16748 transitions. [2022-12-13 15:22:03,333 INFO L496 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) [2022-12-13 15:22:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11081 states and 16748 transitions. [2022-12-13 15:22:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:22:03,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:22:03,337 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:22:03,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 15:22:03,337 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:22:03,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:22:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2089244152, now seen corresponding path program 1 times [2022-12-13 15:22:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:22:03,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717553855] [2022-12-13 15:22:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:22:03,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:22:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:03,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:22:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:03,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:22:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:03,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:22:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:03,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:22:03,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:03,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:22:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:22:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:22:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717553855] [2022-12-13 15:22:03,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717553855] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:22:03,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:22:03,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:22:03,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519442343] [2022-12-13 15:22:03,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:22:03,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:22:03,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:22:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:22:03,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:22:03,461 INFO L87 Difference]: Start difference. First operand 11081 states and 16748 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) [2022-12-13 15:22:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:22:12,141 INFO L93 Difference]: Finished difference Result 39748 states and 61999 transitions. [2022-12-13 15:22:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:22:12,142 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 [2022-12-13 15:22:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:22:12,202 INFO L225 Difference]: With dead ends: 39748 [2022-12-13 15:22:12,202 INFO L226 Difference]: Without dead ends: 30312 [2022-12-13 15:22:12,219 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:22:12,219 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 1537 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 3481 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1562 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 3580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:22:12,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1562 Valid, 2295 Invalid, 3580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3481 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 15:22:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30312 states. [2022-12-13 15:22:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30312 to 20235. [2022-12-13 15:22:14,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20235 states, 18329 states have (on average 1.520595777183698) internal successors, (27871), 18406 states have internal predecessors, (27871), 1289 states have call successors, (1289), 507 states have call predecessors, (1289), 615 states have return successors, (2146), 1385 states have call predecessors, (2146), 1286 states have call successors, (2146) [2022-12-13 15:22:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20235 states to 20235 states and 31306 transitions. [2022-12-13 15:22:14,743 INFO L78 Accepts]: Start accepts. Automaton has 20235 states and 31306 transitions. Word has length 146 [2022-12-13 15:22:14,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:22:14,743 INFO L495 AbstractCegarLoop]: Abstraction has 20235 states and 31306 transitions. [2022-12-13 15:22:14,743 INFO L496 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) [2022-12-13 15:22:14,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20235 states and 31306 transitions. [2022-12-13 15:22:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:22:14,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:22:14,749 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:22:14,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 15:22:14,750 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:22:14,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:22:14,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1756601014, now seen corresponding path program 1 times [2022-12-13 15:22:14,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:22:14,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718652071] [2022-12-13 15:22:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:22:14,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:22:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:22:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:14,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:22:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:14,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:22:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:14,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:22:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:14,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:22:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:22:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:22:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718652071] [2022-12-13 15:22:14,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718652071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:22:14,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:22:14,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:22:14,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634775966] [2022-12-13 15:22:14,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:22:14,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:22:14,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:22:14,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:22:14,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:22:14,865 INFO L87 Difference]: Start difference. First operand 20235 states and 31306 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) [2022-12-13 15:22:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:22:28,505 INFO L93 Difference]: Finished difference Result 76036 states and 120035 transitions. [2022-12-13 15:22:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:22:28,506 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 [2022-12-13 15:22:28,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:22:28,627 INFO L225 Difference]: With dead ends: 76036 [2022-12-13 15:22:28,627 INFO L226 Difference]: Without dead ends: 57446 [2022-12-13 15:22:28,662 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:22:28,662 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 1772 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1808 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 2976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:22:28,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1808 Valid, 2291 Invalid, 2976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2874 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 15:22:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57446 states. [2022-12-13 15:22:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57446 to 37868. [2022-12-13 15:22:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37868 states, 34458 states have (on average 1.5279180451564223) internal successors, (52649), 34599 states have internal predecessors, (52649), 2345 states have call successors, (2345), 891 states have call predecessors, (2345), 1063 states have return successors, (4724), 2505 states have call predecessors, (4724), 2342 states have call successors, (4724) [2022-12-13 15:22:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37868 states to 37868 states and 59718 transitions. [2022-12-13 15:22:33,988 INFO L78 Accepts]: Start accepts. Automaton has 37868 states and 59718 transitions. Word has length 146 [2022-12-13 15:22:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:22:33,988 INFO L495 AbstractCegarLoop]: Abstraction has 37868 states and 59718 transitions. [2022-12-13 15:22:33,988 INFO L496 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) [2022-12-13 15:22:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37868 states and 59718 transitions. [2022-12-13 15:22:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:22:33,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:22:33,999 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:22:33,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 15:22:33,999 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:22:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:22:34,000 INFO L85 PathProgramCache]: Analyzing trace with hash -609434056, now seen corresponding path program 1 times [2022-12-13 15:22:34,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:22:34,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579767057] [2022-12-13 15:22:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:22:34,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:22:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:34,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:22:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:34,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:22:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:22:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:34,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:22:34,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:22:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:22:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:22:34,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:22:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579767057] [2022-12-13 15:22:34,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579767057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:22:34,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:22:34,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:22:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466582044] [2022-12-13 15:22:34,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:22:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:22:34,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:22:34,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:22:34,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:22:34,112 INFO L87 Difference]: Start difference. First operand 37868 states and 59718 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) [2022-12-13 15:22:57,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:22:57,950 INFO L93 Difference]: Finished difference Result 145507 states and 232641 transitions. [2022-12-13 15:22:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:22:57,950 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 [2022-12-13 15:22:57,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:22:58,246 INFO L225 Difference]: With dead ends: 145507 [2022-12-13 15:22:58,246 INFO L226 Difference]: Without dead ends: 109284 [2022-12-13 15:22:58,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:22:58,333 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 1515 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 3365 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 3365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:22:58,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 2295 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 3365 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-13 15:22:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109284 states. [2022-12-13 15:23:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109284 to 73709. [2022-12-13 15:23:08,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73709 states, 67355 states have (on average 1.5354316680276148) internal successors, (103419), 67624 states have internal predecessors, (103419), 4393 states have call successors, (4393), 1659 states have call predecessors, (4393), 1959 states have return successors, (11274), 4681 states have call predecessors, (11274), 4390 states have call successors, (11274) [2022-12-13 15:23:08,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73709 states to 73709 states and 119086 transitions. [2022-12-13 15:23:08,802 INFO L78 Accepts]: Start accepts. Automaton has 73709 states and 119086 transitions. Word has length 146 [2022-12-13 15:23:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:23:08,802 INFO L495 AbstractCegarLoop]: Abstraction has 73709 states and 119086 transitions. [2022-12-13 15:23:08,802 INFO L496 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) [2022-12-13 15:23:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 73709 states and 119086 transitions. [2022-12-13 15:23:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:23:08,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:23:08,822 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:23:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 15:23:08,822 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:23:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:23:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1392452214, now seen corresponding path program 1 times [2022-12-13 15:23:08,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:23:08,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151827410] [2022-12-13 15:23:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:23:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:23:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:23:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:23:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:23:08,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:23:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:23:08,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:23:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:23:08,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:23:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:23:08,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:23:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:23:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:23:08,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:23:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151827410] [2022-12-13 15:23:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151827410] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:23:08,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:23:08,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:23:08,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548076705] [2022-12-13 15:23:08,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:23:08,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:23:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:23:08,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:23:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:23:08,950 INFO L87 Difference]: Start difference. First operand 73709 states and 119086 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) [2022-12-13 15:23:54,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:23:54,042 INFO L93 Difference]: Finished difference Result 283874 states and 463239 transitions. [2022-12-13 15:23:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:23:54,042 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 [2022-12-13 15:23:54,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:23:54,688 INFO L225 Difference]: With dead ends: 283874 [2022-12-13 15:23:54,688 INFO L226 Difference]: Without dead ends: 211810 [2022-12-13 15:23:54,866 INFO L412 NwaCegarLoop]: 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 [2022-12-13 15:23:54,866 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 1693 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1729 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:23:54,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1729 Valid, 2295 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-13 15:23:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211810 states. [2022-12-13 15:24:16,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211810 to 145262. [2022-12-13 15:24:16,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145262 states, 133148 states have (on average 1.540278487097065) internal successors, (205085), 133673 states have internal predecessors, (205085), 8361 states have call successors, (8361), 3195 states have call predecessors, (8361), 3751 states have return successors, (28620), 8905 states have call predecessors, (28620), 8358 states have call successors, (28620) [2022-12-13 15:24:17,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145262 states to 145262 states and 242066 transitions. [2022-12-13 15:24:17,017 INFO L78 Accepts]: Start accepts. Automaton has 145262 states and 242066 transitions. Word has length 146 [2022-12-13 15:24:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:24:17,018 INFO L495 AbstractCegarLoop]: Abstraction has 145262 states and 242066 transitions. [2022-12-13 15:24:17,018 INFO L496 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) [2022-12-13 15:24:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 145262 states and 242066 transitions. [2022-12-13 15:24:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:24:17,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:24:17,058 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:24:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 15:24:17,059 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:24:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:24:17,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1175370120, now seen corresponding path program 1 times [2022-12-13 15:24:17,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:24:17,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133228307] [2022-12-13 15:24:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:24:17,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:24:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:24:17,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:24:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:24:17,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:24:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:24:17,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:24:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:24:17,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:24:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:24:17,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:24:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:24:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:24:17,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:24:17,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133228307] [2022-12-13 15:24:17,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133228307] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:24:17,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:24:17,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:24:17,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90469765] [2022-12-13 15:24:17,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:24:17,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:24:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:24:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:24:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:24:17,258 INFO L87 Difference]: Start difference. First operand 145262 states and 242066 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) [2022-12-13 15:25:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:25:47,609 INFO L93 Difference]: Finished difference Result 555873 states and 934381 transitions. [2022-12-13 15:25:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:25:47,609 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 [2022-12-13 15:25:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:25:49,153 INFO L225 Difference]: With dead ends: 555873 [2022-12-13 15:25:49,154 INFO L226 Difference]: Without dead ends: 412256 [2022-12-13 15:25:49,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:25:49,567 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 1659 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 2831 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 2933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:25:49,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1695 Valid, 2295 Invalid, 2933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2831 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 15:25:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412256 states. [2022-12-13 15:26:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412256 to 288111. [2022-12-13 15:26:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288111 states, 264733 states have (on average 1.543710077700929) internal successors, (408671), 265770 states have internal predecessors, (408671), 16041 states have call successors, (16041), 6267 states have call predecessors, (16041), 7335 states have return successors, (76178), 17097 states have call predecessors, (76178), 16038 states have call successors, (76178) [2022-12-13 15:26:37,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288111 states to 288111 states and 500890 transitions. [2022-12-13 15:26:37,359 INFO L78 Accepts]: Start accepts. Automaton has 288111 states and 500890 transitions. Word has length 146 [2022-12-13 15:26:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:26:37,359 INFO L495 AbstractCegarLoop]: Abstraction has 288111 states and 500890 transitions. [2022-12-13 15:26:37,359 INFO L496 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) [2022-12-13 15:26:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 288111 states and 500890 transitions. [2022-12-13 15:26:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:26:37,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:26:37,447 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:26:37,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 15:26:37,447 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:26:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:26:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash -704013770, now seen corresponding path program 1 times [2022-12-13 15:26:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:26:37,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337621369] [2022-12-13 15:26:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:26:37,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:26:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:26:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:26:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:26:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:26:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:26:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:26:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:26:37,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:26:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:26:37,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:26:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:26:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:26:37,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:26:37,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337621369] [2022-12-13 15:26:37,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337621369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:26:37,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:26:37,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:26:37,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522914630] [2022-12-13 15:26:37,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:26:37,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:26:37,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:26:37,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:26:37,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:26:37,558 INFO L87 Difference]: Start difference. First operand 288111 states and 500890 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) [2022-12-13 15:29:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:29:35,279 INFO L93 Difference]: Finished difference Result 1075038 states and 1891519 transitions. [2022-12-13 15:29:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:29:35,279 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 [2022-12-13 15:29:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:29:38,783 INFO L225 Difference]: With dead ends: 1075038 [2022-12-13 15:29:38,783 INFO L226 Difference]: Without dead ends: 788572 [2022-12-13 15:29:39,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-13 15:29:39,961 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 1576 mSDsluCounter, 1771 mSDsCounter, 0 mSdLazyCounter, 2804 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:29:39,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 2295 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2804 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-13 15:29:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788572 states. [2022-12-13 15:31:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788572 to 574321. [2022-12-13 15:31:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574321 states, 528927 states have (on average 1.547289134417415) internal successors, (818403), 530988 states have internal predecessors, (818403), 30889 states have call successors, (30889), 12411 states have call predecessors, (30889), 14503 states have return successors, (210148), 32969 states have call predecessors, (210148), 30886 states have call successors, (210148) [2022-12-13 15:31:18,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574321 states to 574321 states and 1059440 transitions. [2022-12-13 15:31:18,272 INFO L78 Accepts]: Start accepts. Automaton has 574321 states and 1059440 transitions. Word has length 146 [2022-12-13 15:31:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:31:18,272 INFO L495 AbstractCegarLoop]: Abstraction has 574321 states and 1059440 transitions. [2022-12-13 15:31:18,272 INFO L496 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) [2022-12-13 15:31:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 574321 states and 1059440 transitions. [2022-12-13 15:31:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-13 15:31:18,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:31:18,525 INFO L195 NwaCegarLoop]: 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] [2022-12-13 15:31:18,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 15:31:18,525 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:31:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:31:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1459602804, now seen corresponding path program 1 times [2022-12-13 15:31:18,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:31:18,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174065687] [2022-12-13 15:31:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:31:18,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:31:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:18,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 15:31:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 15:31:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:18,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 15:31:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-12-13 15:31:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-12-13 15:31:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:31:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:31:18,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:31:18,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174065687] [2022-12-13 15:31:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174065687] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:31:18,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:31:18,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:31:18,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721411230] [2022-12-13 15:31:18,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:31:18,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:31:18,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:31:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:31:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:31:18,689 INFO L87 Difference]: Start difference. First operand 574321 states and 1059440 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)