./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/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_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/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_3fdc709c-4593-4f1e-88f1-5858679f80e5/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 ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 --- 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 16:09:21,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:09:21,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:09:21,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:09:21,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:09:21,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:09:21,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:09:21,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:09:21,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:09:21,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:09:21,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:09:21,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:09:21,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:09:21,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:09:21,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:09:21,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:09:21,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:09:21,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:09:21,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:09:21,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:09:21,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:09:21,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:09:21,796 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:09:21,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:09:21,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:09:21,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:09:21,800 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:09:21,801 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:09:21,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:09:21,802 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:09:21,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:09:21,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:09:21,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:09:21,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:09:21,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:09:21,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:09:21,806 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:09:21,807 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:09:21,807 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:09:21,808 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:09:21,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:09:21,809 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:09:21,828 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:09:21,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:09:21,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:09:21,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:09:21,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:09:21,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:09:21,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:09:21,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:09:21,830 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:09:21,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:09:21,831 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:09:21,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:09:21,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:09:21,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:09:21,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:09:21,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:09:21,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:09:21,832 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:09:21,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:09:21,832 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:09:21,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:09:21,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:09:21,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:09:21,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:09:21,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:09:21,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:09:21,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:09:21,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:09:21,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:09:21,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:09:21,834 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:09:21,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:09:21,834 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:09:21,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:09:21,834 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:09:21,835 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_3fdc709c-4593-4f1e-88f1-5858679f80e5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad0884018313fc350052496ea1071e31a8b2c3997d36767afc87946a21697816 [2022-12-13 16:09:22,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:09:22,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:09:22,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:09:22,040 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:09:22,041 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:09:22,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-12-13 16:09:24,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:09:25,025 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:09:25,025 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c [2022-12-13 16:09:25,055 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/data/1f6c8385f/f7eba1e86d4b44d782b273b20f34c8b4/FLAG65b56ae7b [2022-12-13 16:09:25,065 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/data/1f6c8385f/f7eba1e86d4b44d782b273b20f34c8b4 [2022-12-13 16:09:25,067 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:09:25,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:09:25,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:09:25,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:09:25,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:09:25,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:09:25" (1/1) ... [2022-12-13 16:09:25,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716be5f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:25, skipping insertion in model container [2022-12-13 16:09:25,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:09:25" (1/1) ... [2022-12-13 16:09:25,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:09:25,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:09:25,612 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_3fdc709c-4593-4f1e-88f1-5858679f80e5/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2022-12-13 16:09:25,734 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,735 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,736 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,738 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,743 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,744 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,744 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,745 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,746 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,747 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,748 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,749 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,753 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:25,754 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:09:26,050 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:09:26,090 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_3fdc709c-4593-4f1e-88f1-5858679f80e5/sv-benchmarks/c/ntdrivers/cdaudio.i.cil-1.c[90162,90175] [2022-12-13 16:09:26,100 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,101 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,102 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,103 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,104 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,105 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,105 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,105 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,106 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,106 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,107 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,107 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,109 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,109 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:09:26,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:09:26,294 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:09:26,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26 WrapperNode [2022-12-13 16:09:26,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:09:26,295 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:09:26,295 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:09:26,295 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:09:26,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,402 INFO L138 Inliner]: procedures = 120, calls = 2195, calls flagged for inlining = 23, calls inlined = 19, statements flattened = 2336 [2022-12-13 16:09:26,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:09:26,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:09:26,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:09:26,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:09:26,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,475 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:09:26,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:09:26,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:09:26,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:09:26,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (1/1) ... [2022-12-13 16:09:26,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:09:26,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:09:26,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:09:26,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:09:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-13 16:09:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-13 16:09:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-13 16:09:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:09:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-12-13 16:09:26,545 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-12-13 16:09:26,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-12-13 16:09:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-12-13 16:09:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure MmLockPagableDataSection [2022-12-13 16:09:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure MmLockPagableDataSection [2022-12-13 16:09:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:09:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2022-12-13 16:09:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2022-12-13 16:09:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure IoOpenDeviceRegistryKey [2022-12-13 16:09:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure IoOpenDeviceRegistryKey [2022-12-13 16:09:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-12-13 16:09:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-12-13 16:09:26,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-13 16:09:26,546 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_malloc [2022-12-13 16:09:26,547 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_malloc [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-12-13 16:09:26,547 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure ZwClose [2022-12-13 16:09:26,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ZwClose [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2022-12-13 16:09:26,547 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:09:26,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 16:09:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:09:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-12-13 16:09:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-12-13 16:09:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-12-13 16:09:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 16:09:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2022-12-13 16:09:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2022-12-13 16:09:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2022-12-13 16:09:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-12-13 16:09:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2022-12-13 16:09:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2022-12-13 16:09:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-12-13 16:09:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:09:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:09:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2022-12-13 16:09:26,550 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2022-12-13 16:09:26,869 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:09:26,871 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:09:27,012 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,028 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-12-13 16:09:27,029 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-12-13 16:09:27,428 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,452 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2022-12-13 16:09:27,452 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2022-12-13 16:09:27,469 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,470 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,471 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,476 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,483 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:27,489 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:37,758 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##276: assume false; [2022-12-13 16:09:37,758 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##277: assume !false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##504: assume !false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##503: assume false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L3709: CdAudioPnp_#res#1 := 0; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##172: assume !false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##171: assume false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##65: assume !false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##64: assume false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##43: assume !false; [2022-12-13 16:09:37,759 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##42: assume false; [2022-12-13 16:09:37,760 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##32: assume false; [2022-12-13 16:09:37,760 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##33: assume !false; [2022-12-13 16:09:37,786 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 16:09:37,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-12-13 16:09:37,789 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-12-13 16:09:37,803 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:09:37,814 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:09:37,814 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 16:09:37,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:09:37 BoogieIcfgContainer [2022-12-13 16:09:37,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:09:37,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:09:37,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:09:37,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:09:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:09:25" (1/3) ... [2022-12-13 16:09:37,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753fafc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:09:37, skipping insertion in model container [2022-12-13 16:09:37,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:09:26" (2/3) ... [2022-12-13 16:09:37,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753fafc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:09:37, skipping insertion in model container [2022-12-13 16:09:37,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:09:37" (3/3) ... [2022-12-13 16:09:37,826 INFO L112 eAbstractionObserver]: Analyzing ICFG cdaudio.i.cil-1.c [2022-12-13 16:09:37,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:09:37,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 16:09:37,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:09:37,899 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;@a6d4657, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:09:37,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 16:09:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2022-12-13 16:09:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 16:09:37,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:37,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:09:37,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:37,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:37,916 INFO L85 PathProgramCache]: Analyzing trace with hash 5486212, now seen corresponding path program 1 times [2022-12-13 16:09:37,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:37,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120796569] [2022-12-13 16:09:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:37,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:38,250 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 16:09:38,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:38,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120796569] [2022-12-13 16:09:38,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120796569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:38,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:38,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616608497] [2022-12-13 16:09:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:38,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:38,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:38,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:38,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:38,282 INFO L87 Difference]: Start difference. First operand has 617 states, 483 states have (on average 1.5196687370600415) internal successors, (734), 502 states have internal predecessors, (734), 113 states have call successors, (113), 19 states have call predecessors, (113), 19 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:38,435 INFO L93 Difference]: Finished difference Result 1237 states and 1975 transitions. [2022-12-13 16:09:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:38,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-13 16:09:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:38,446 INFO L225 Difference]: With dead ends: 1237 [2022-12-13 16:09:38,447 INFO L226 Difference]: Without dead ends: 610 [2022-12-13 16:09:38,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:38,454 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 20 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:38,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1795 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:09:38,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-12-13 16:09:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 610. [2022-12-13 16:09:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 478 states have (on average 1.4853556485355648) internal successors, (710), 495 states have internal predecessors, (710), 113 states have call successors, (113), 19 states have call predecessors, (113), 18 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-12-13 16:09:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 920 transitions. [2022-12-13 16:09:38,513 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 920 transitions. Word has length 19 [2022-12-13 16:09:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:38,513 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 920 transitions. [2022-12-13 16:09:38,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 920 transitions. [2022-12-13 16:09:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 16:09:38,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:38,514 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] [2022-12-13 16:09:38,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 16:09:38,514 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:38,515 INFO L85 PathProgramCache]: Analyzing trace with hash 405571933, now seen corresponding path program 1 times [2022-12-13 16:09:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:38,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827722575] [2022-12-13 16:09:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:38,597 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 16:09:38,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:38,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827722575] [2022-12-13 16:09:38,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827722575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:38,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:38,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:38,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65335863] [2022-12-13 16:09:38,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:38,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:38,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:38,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:38,600 INFO L87 Difference]: Start difference. First operand 610 states and 920 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:38,754 INFO L93 Difference]: Finished difference Result 1123 states and 1681 transitions. [2022-12-13 16:09:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:38,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 16:09:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:38,759 INFO L225 Difference]: With dead ends: 1123 [2022-12-13 16:09:38,759 INFO L226 Difference]: Without dead ends: 882 [2022-12-13 16:09:38,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:38,761 INFO L413 NwaCegarLoop]: 1249 mSDtfsCounter, 834 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:38,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 1663 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:09:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-12-13 16:09:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 863. [2022-12-13 16:09:38,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.4651162790697674) internal successors, (1008), 691 states have internal predecessors, (1008), 142 states have call successors, (142), 33 states have call predecessors, (142), 32 states have return successors, (146), 140 states have call predecessors, (146), 130 states have call successors, (146) [2022-12-13 16:09:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1296 transitions. [2022-12-13 16:09:38,795 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1296 transitions. Word has length 21 [2022-12-13 16:09:38,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:38,795 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1296 transitions. [2022-12-13 16:09:38,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1296 transitions. [2022-12-13 16:09:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 16:09:38,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:38,797 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] [2022-12-13 16:09:38,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 16:09:38,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:38,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:38,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1497789841, now seen corresponding path program 1 times [2022-12-13 16:09:38,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:38,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362849926] [2022-12-13 16:09:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:38,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:38,877 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 16:09:38,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:38,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362849926] [2022-12-13 16:09:38,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362849926] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:38,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:38,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:38,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390789223] [2022-12-13 16:09:38,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:38,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:38,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:38,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:38,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:38,879 INFO L87 Difference]: Start difference. First operand 863 states and 1296 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:39,032 INFO L93 Difference]: Finished difference Result 1823 states and 2803 transitions. [2022-12-13 16:09:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 16:09:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:39,038 INFO L225 Difference]: With dead ends: 1823 [2022-12-13 16:09:39,038 INFO L226 Difference]: Without dead ends: 1428 [2022-12-13 16:09:39,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:39,040 INFO L413 NwaCegarLoop]: 1422 mSDtfsCounter, 575 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:39,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 2288 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:09:39,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-12-13 16:09:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1026. [2022-12-13 16:09:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 809 states have (on average 1.4536464771322621) internal successors, (1176), 811 states have internal predecessors, (1176), 170 states have call successors, (170), 46 states have call predecessors, (170), 46 states have return successors, (217), 170 states have call predecessors, (217), 158 states have call successors, (217) [2022-12-13 16:09:39,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1563 transitions. [2022-12-13 16:09:39,081 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1563 transitions. Word has length 28 [2022-12-13 16:09:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:39,082 INFO L495 AbstractCegarLoop]: Abstraction has 1026 states and 1563 transitions. [2022-12-13 16:09:39,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1563 transitions. [2022-12-13 16:09:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 16:09:39,083 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:39,083 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] [2022-12-13 16:09:39,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 16:09:39,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:39,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1577683242, now seen corresponding path program 1 times [2022-12-13 16:09:39,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:39,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822797878] [2022-12-13 16:09:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:39,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:39,221 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 16:09:39,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822797878] [2022-12-13 16:09:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822797878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:39,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:39,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:39,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907159071] [2022-12-13 16:09:39,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:39,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:39,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:39,223 INFO L87 Difference]: Start difference. First operand 1026 states and 1563 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:39,281 INFO L93 Difference]: Finished difference Result 1670 states and 2499 transitions. [2022-12-13 16:09:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:39,282 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 16:09:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:39,287 INFO L225 Difference]: With dead ends: 1670 [2022-12-13 16:09:39,287 INFO L226 Difference]: Without dead ends: 1538 [2022-12-13 16:09:39,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:39,289 INFO L413 NwaCegarLoop]: 1132 mSDtfsCounter, 837 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:39,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1530 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:09:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-12-13 16:09:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1477. [2022-12-13 16:09:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1173 states have (on average 1.4578005115089514) internal successors, (1710), 1171 states have internal predecessors, (1710), 227 states have call successors, (227), 72 states have call predecessors, (227), 76 states have return successors, (298), 233 states have call predecessors, (298), 218 states have call successors, (298) [2022-12-13 16:09:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2235 transitions. [2022-12-13 16:09:39,347 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2235 transitions. Word has length 28 [2022-12-13 16:09:39,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:39,347 INFO L495 AbstractCegarLoop]: Abstraction has 1477 states and 2235 transitions. [2022-12-13 16:09:39,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2235 transitions. [2022-12-13 16:09:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 16:09:39,348 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:39,348 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] [2022-12-13 16:09:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 16:09:39,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash 574098819, now seen corresponding path program 1 times [2022-12-13 16:09:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877453182] [2022-12-13 16:09:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:39,509 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 16:09:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:39,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877453182] [2022-12-13 16:09:39,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877453182] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:39,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:39,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:09:39,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446659359] [2022-12-13 16:09:39,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:39,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:39,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:39,511 INFO L87 Difference]: Start difference. First operand 1477 states and 2235 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:40,097 INFO L93 Difference]: Finished difference Result 2654 states and 4047 transitions. [2022-12-13 16:09:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:09:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 16:09:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:40,103 INFO L225 Difference]: With dead ends: 2654 [2022-12-13 16:09:40,103 INFO L226 Difference]: Without dead ends: 1775 [2022-12-13 16:09:40,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:40,106 INFO L413 NwaCegarLoop]: 1157 mSDtfsCounter, 1421 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 1469 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:40,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1423 Valid, 1469 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 16:09:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-12-13 16:09:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1465. [2022-12-13 16:09:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1163 states have (on average 1.4548581255374033) internal successors, (1692), 1161 states have internal predecessors, (1692), 225 states have call successors, (225), 70 states have call predecessors, (225), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2022-12-13 16:09:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 2211 transitions. [2022-12-13 16:09:40,161 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 2211 transitions. Word has length 29 [2022-12-13 16:09:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:40,161 INFO L495 AbstractCegarLoop]: Abstraction has 1465 states and 2211 transitions. [2022-12-13 16:09:40,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 2211 transitions. [2022-12-13 16:09:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 16:09:40,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:40,162 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] [2022-12-13 16:09:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 16:09:40,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1666004885, now seen corresponding path program 1 times [2022-12-13 16:09:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:40,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679706558] [2022-12-13 16:09:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:40,236 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 16:09:40,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:40,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679706558] [2022-12-13 16:09:40,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679706558] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:40,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:40,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:09:40,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116503337] [2022-12-13 16:09:40,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:40,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:09:40,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:09:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:40,238 INFO L87 Difference]: Start difference. First operand 1465 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:40,343 INFO L93 Difference]: Finished difference Result 1468 states and 2213 transitions. [2022-12-13 16:09:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:09:40,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 16:09:40,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:40,348 INFO L225 Difference]: With dead ends: 1468 [2022-12-13 16:09:40,348 INFO L226 Difference]: Without dead ends: 1464 [2022-12-13 16:09:40,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:09:40,350 INFO L413 NwaCegarLoop]: 879 mSDtfsCounter, 34 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:40,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1701 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:09:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-12-13 16:09:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1464. [2022-12-13 16:09:40,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1163 states have (on average 1.4531384350816854) internal successors, (1690), 1160 states have internal predecessors, (1690), 224 states have call successors, (224), 70 states have call predecessors, (224), 76 states have return successors, (294), 233 states have call predecessors, (294), 216 states have call successors, (294) [2022-12-13 16:09:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2208 transitions. [2022-12-13 16:09:40,409 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2208 transitions. Word has length 28 [2022-12-13 16:09:40,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:40,409 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 2208 transitions. [2022-12-13 16:09:40,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2208 transitions. [2022-12-13 16:09:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 16:09:40,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:40,411 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] [2022-12-13 16:09:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 16:09:40,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1579997021, now seen corresponding path program 1 times [2022-12-13 16:09:40,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:40,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177450557] [2022-12-13 16:09:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:40,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 16:09:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:40,560 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 16:09:40,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177450557] [2022-12-13 16:09:40,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177450557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:40,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:40,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:09:40,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192066179] [2022-12-13 16:09:40,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:40,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:09:40,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:09:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:40,562 INFO L87 Difference]: Start difference. First operand 1464 states and 2208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 16:09:44,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:47,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:50,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:52,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:54,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:56,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:58,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:09:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:58,279 INFO L93 Difference]: Finished difference Result 2260 states and 3359 transitions. [2022-12-13 16:09:58,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:09:58,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-12-13 16:09:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:58,285 INFO L225 Difference]: With dead ends: 2260 [2022-12-13 16:09:58,285 INFO L226 Difference]: Without dead ends: 1239 [2022-12-13 16:09:58,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:09:58,287 INFO L413 NwaCegarLoop]: 876 mSDtfsCounter, 798 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 282 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2437 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 2437 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 557 Invalid, 5 Unknown, 0 Unchecked, 17.6s Time] [2022-12-13 16:09:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-12-13 16:09:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1097. [2022-12-13 16:09:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4311926605504588) internal successors, (1248), 871 states have internal predecessors, (1248), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-12-13 16:09:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1626 transitions. [2022-12-13 16:09:58,329 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1626 transitions. Word has length 41 [2022-12-13 16:09:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:58,329 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1626 transitions. [2022-12-13 16:09:58,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 16:09:58,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1626 transitions. [2022-12-13 16:09:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 16:09:58,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:58,330 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] [2022-12-13 16:09:58,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 16:09:58,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash -9397451, now seen corresponding path program 1 times [2022-12-13 16:09:58,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:58,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669342151] [2022-12-13 16:09:58,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:58,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:58,447 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 16:09:58,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:58,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669342151] [2022-12-13 16:09:58,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669342151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:58,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:58,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:09:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717429336] [2022-12-13 16:09:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:58,449 INFO L87 Difference]: Start difference. First operand 1097 states and 1626 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:58,860 INFO L93 Difference]: Finished difference Result 1158 states and 1706 transitions. [2022-12-13 16:09:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:09:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 16:09:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:58,868 INFO L225 Difference]: With dead ends: 1158 [2022-12-13 16:09:58,868 INFO L226 Difference]: Without dead ends: 1114 [2022-12-13 16:09:58,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:58,869 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 916 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 916 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:58,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [916 Valid, 1526 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 16:09:58,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-12-13 16:09:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1097. [2022-12-13 16:09:58,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 872 states have (on average 1.4288990825688073) internal successors, (1246), 871 states have internal predecessors, (1246), 163 states have call successors, (163), 55 states have call predecessors, (163), 61 states have return successors, (215), 170 states have call predecessors, (215), 155 states have call successors, (215) [2022-12-13 16:09:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 1624 transitions. [2022-12-13 16:09:58,916 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 1624 transitions. Word has length 37 [2022-12-13 16:09:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:58,916 INFO L495 AbstractCegarLoop]: Abstraction has 1097 states and 1624 transitions. [2022-12-13 16:09:58,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 1624 transitions. [2022-12-13 16:09:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 16:09:58,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:58,917 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] [2022-12-13 16:09:58,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 16:09:58,918 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1221971472, now seen corresponding path program 1 times [2022-12-13 16:09:58,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:58,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293708581] [2022-12-13 16:09:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:58,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:59,028 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 16:09:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:59,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293708581] [2022-12-13 16:09:59,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293708581] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:59,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:59,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:09:59,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529283411] [2022-12-13 16:09:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:59,030 INFO L87 Difference]: Start difference. First operand 1097 states and 1624 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:09:59,396 INFO L93 Difference]: Finished difference Result 1148 states and 1689 transitions. [2022-12-13 16:09:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:09:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-13 16:09:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:09:59,401 INFO L225 Difference]: With dead ends: 1148 [2022-12-13 16:09:59,401 INFO L226 Difference]: Without dead ends: 1076 [2022-12-13 16:09:59,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:09:59,402 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 895 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:09:59,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1525 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 16:09:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-12-13 16:09:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1074. [2022-12-13 16:09:59,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 851 states have (on average 1.434782608695652) internal successors, (1221), 857 states have internal predecessors, (1221), 163 states have call successors, (163), 55 states have call predecessors, (163), 59 states have return successors, (206), 161 states have call predecessors, (206), 155 states have call successors, (206) [2022-12-13 16:09:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1590 transitions. [2022-12-13 16:09:59,477 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1590 transitions. Word has length 39 [2022-12-13 16:09:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:09:59,478 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1590 transitions. [2022-12-13 16:09:59,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:09:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1590 transitions. [2022-12-13 16:09:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 16:09:59,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:09:59,479 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] [2022-12-13 16:09:59,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 16:09:59,480 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:09:59,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:09:59,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1795960592, now seen corresponding path program 1 times [2022-12-13 16:09:59,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:09:59,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599895103] [2022-12-13 16:09:59,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:09:59,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:09:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:09:59,617 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 16:09:59,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:09:59,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599895103] [2022-12-13 16:09:59,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599895103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:09:59,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:09:59,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:09:59,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001374963] [2022-12-13 16:09:59,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:09:59,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:09:59,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:09:59,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:09:59,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:09:59,619 INFO L87 Difference]: Start difference. First operand 1074 states and 1590 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:00,068 INFO L93 Difference]: Finished difference Result 1358 states and 2005 transitions. [2022-12-13 16:10:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:10:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-13 16:10:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:00,074 INFO L225 Difference]: With dead ends: 1358 [2022-12-13 16:10:00,074 INFO L226 Difference]: Without dead ends: 1349 [2022-12-13 16:10:00,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:00,075 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 1158 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1801 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:00,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1801 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 16:10:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2022-12-13 16:10:00,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1090. [2022-12-13 16:10:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 866 states have (on average 1.430715935334873) internal successors, (1239), 872 states have internal predecessors, (1239), 163 states have call successors, (163), 55 states have call predecessors, (163), 60 states have return successors, (206), 162 states have call predecessors, (206), 155 states have call successors, (206) [2022-12-13 16:10:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1608 transitions. [2022-12-13 16:10:00,156 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1608 transitions. Word has length 39 [2022-12-13 16:10:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:00,156 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1608 transitions. [2022-12-13 16:10:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1608 transitions. [2022-12-13 16:10:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 16:10:00,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:00,157 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] [2022-12-13 16:10:00,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 16:10:00,157 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:00,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1796237422, now seen corresponding path program 1 times [2022-12-13 16:10:00,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:00,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500843348] [2022-12-13 16:10:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:00,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:00,217 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 16:10:00,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:00,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500843348] [2022-12-13 16:10:00,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500843348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:00,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:00,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:10:00,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107378463] [2022-12-13 16:10:00,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:00,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:10:00,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:00,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:10:00,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:10:00,219 INFO L87 Difference]: Start difference. First operand 1090 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:00,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:00,307 INFO L93 Difference]: Finished difference Result 1192 states and 1745 transitions. [2022-12-13 16:10:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:10:00,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-13 16:10:00,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:00,310 INFO L225 Difference]: With dead ends: 1192 [2022-12-13 16:10:00,311 INFO L226 Difference]: Without dead ends: 1164 [2022-12-13 16:10:00,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:10:00,312 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 867 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:00,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 938 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:10:00,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-12-13 16:10:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1141. [2022-12-13 16:10:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 913 states have (on average 1.429353778751369) internal successors, (1305), 919 states have internal predecessors, (1305), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2022-12-13 16:10:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 1678 transitions. [2022-12-13 16:10:00,363 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 1678 transitions. Word has length 39 [2022-12-13 16:10:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:00,363 INFO L495 AbstractCegarLoop]: Abstraction has 1141 states and 1678 transitions. [2022-12-13 16:10:00,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 1678 transitions. [2022-12-13 16:10:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 16:10:00,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:00,365 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] [2022-12-13 16:10:00,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 16:10:00,365 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:00,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:00,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1810582331, now seen corresponding path program 1 times [2022-12-13 16:10:00,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:00,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545785462] [2022-12-13 16:10:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:00,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:00,427 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 16:10:00,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:00,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545785462] [2022-12-13 16:10:00,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545785462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:00,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:00,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:10:00,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633626983] [2022-12-13 16:10:00,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:00,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:10:00,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:00,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:10:00,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:10:00,429 INFO L87 Difference]: Start difference. First operand 1141 states and 1678 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:00,586 INFO L93 Difference]: Finished difference Result 1402 states and 2062 transitions. [2022-12-13 16:10:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:10:00,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-13 16:10:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:00,590 INFO L225 Difference]: With dead ends: 1402 [2022-12-13 16:10:00,590 INFO L226 Difference]: Without dead ends: 1389 [2022-12-13 16:10:00,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:10:00,591 INFO L413 NwaCegarLoop]: 1170 mSDtfsCounter, 353 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1982 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:00,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1982 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:10:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-12-13 16:10:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1138. [2022-12-13 16:10:00,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 910 states have (on average 1.4263736263736264) internal successors, (1298), 916 states have internal predecessors, (1298), 164 states have call successors, (164), 56 states have call predecessors, (164), 63 states have return successors, (209), 165 states have call predecessors, (209), 156 states have call successors, (209) [2022-12-13 16:10:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1671 transitions. [2022-12-13 16:10:00,646 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1671 transitions. Word has length 39 [2022-12-13 16:10:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:00,646 INFO L495 AbstractCegarLoop]: Abstraction has 1138 states and 1671 transitions. [2022-12-13 16:10:00,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1671 transitions. [2022-12-13 16:10:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 16:10:00,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:00,647 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] [2022-12-13 16:10:00,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 16:10:00,647 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash -935716902, now seen corresponding path program 1 times [2022-12-13 16:10:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:00,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109623040] [2022-12-13 16:10:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:00,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:00,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 16:10:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:00,757 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 16:10:00,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109623040] [2022-12-13 16:10:00,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109623040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:00,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:00,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:10:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691650496] [2022-12-13 16:10:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:10:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:10:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:10:00,759 INFO L87 Difference]: Start difference. First operand 1138 states and 1671 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 16:10:05,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:07,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:10,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:13,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:13,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:13,562 INFO L93 Difference]: Finished difference Result 1761 states and 2599 transitions. [2022-12-13 16:10:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:10:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-12-13 16:10:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:13,569 INFO L225 Difference]: With dead ends: 1761 [2022-12-13 16:10:13,569 INFO L226 Difference]: Without dead ends: 1129 [2022-12-13 16:10:13,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:13,571 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 919 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 126 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:13,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1195 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 373 Invalid, 4 Unknown, 0 Unchecked, 12.7s Time] [2022-12-13 16:10:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-12-13 16:10:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1070. [2022-12-13 16:10:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 849 states have (on average 1.4204946996466432) internal successors, (1206), 853 states have internal predecessors, (1206), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-12-13 16:10:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1572 transitions. [2022-12-13 16:10:13,630 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1572 transitions. Word has length 42 [2022-12-13 16:10:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:13,630 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1572 transitions. [2022-12-13 16:10:13,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 16:10:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1572 transitions. [2022-12-13 16:10:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 16:10:13,631 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:13,631 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] [2022-12-13 16:10:13,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 16:10:13,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 159691478, now seen corresponding path program 1 times [2022-12-13 16:10:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019466790] [2022-12-13 16:10:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:13,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:13,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:13,732 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 16:10:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:13,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019466790] [2022-12-13 16:10:13,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019466790] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:13,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:13,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:10:13,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052650927] [2022-12-13 16:10:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:10:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:13,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:10:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:10:13,733 INFO L87 Difference]: Start difference. First operand 1070 states and 1572 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:13,874 INFO L93 Difference]: Finished difference Result 1082 states and 1584 transitions. [2022-12-13 16:10:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:10:13,874 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 16:10:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:13,878 INFO L225 Difference]: With dead ends: 1082 [2022-12-13 16:10:13,878 INFO L226 Difference]: Without dead ends: 1054 [2022-12-13 16:10:13,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:10:13,879 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 34 mSDsluCounter, 3425 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 4293 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:13,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 4293 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:10:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-12-13 16:10:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1054. [2022-12-13 16:10:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 833 states have (on average 1.424969987995198) internal successors, (1187), 837 states have internal predecessors, (1187), 161 states have call successors, (161), 55 states have call predecessors, (161), 59 states have return successors, (205), 161 states have call predecessors, (205), 155 states have call successors, (205) [2022-12-13 16:10:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1553 transitions. [2022-12-13 16:10:13,937 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1553 transitions. Word has length 40 [2022-12-13 16:10:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:13,937 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1553 transitions. [2022-12-13 16:10:13,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:10:13,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1553 transitions. [2022-12-13 16:10:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 16:10:13,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:13,939 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] [2022-12-13 16:10:13,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 16:10:13,939 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 209462248, now seen corresponding path program 1 times [2022-12-13 16:10:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767767243] [2022-12-13 16:10:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:13,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:14,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 16:10:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:14,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 16:10:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:14,031 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 16:10:14,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:14,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767767243] [2022-12-13 16:10:14,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767767243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:14,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:14,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:10:14,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403646191] [2022-12-13 16:10:14,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:14,032 INFO L87 Difference]: Start difference. First operand 1054 states and 1553 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:10:19,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:22,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:24,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:26,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:27,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:27,011 INFO L93 Difference]: Finished difference Result 1720 states and 2550 transitions. [2022-12-13 16:10:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:10:27,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-12-13 16:10:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:27,016 INFO L225 Difference]: With dead ends: 1720 [2022-12-13 16:10:27,016 INFO L226 Difference]: Without dead ends: 1185 [2022-12-13 16:10:27,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:10:27,017 INFO L413 NwaCegarLoop]: 815 mSDtfsCounter, 614 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 244 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2259 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:27,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2259 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 697 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2022-12-13 16:10:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-12-13 16:10:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1021. [2022-12-13 16:10:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 808 states have (on average 1.4245049504950495) internal successors, (1151), 815 states have internal predecessors, (1151), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-12-13 16:10:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1519 transitions. [2022-12-13 16:10:27,078 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1519 transitions. Word has length 49 [2022-12-13 16:10:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:27,079 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1519 transitions. [2022-12-13 16:10:27,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:10:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1519 transitions. [2022-12-13 16:10:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 16:10:27,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:27,081 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] [2022-12-13 16:10:27,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 16:10:27,082 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:27,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:27,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1748370751, now seen corresponding path program 1 times [2022-12-13 16:10:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:27,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130707954] [2022-12-13 16:10:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:27,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 16:10:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:10:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:27,180 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 16:10:27,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130707954] [2022-12-13 16:10:27,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130707954] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:27,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:27,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:10:27,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075697349] [2022-12-13 16:10:27,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:27,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:27,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:27,182 INFO L87 Difference]: Start difference. First operand 1021 states and 1519 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:10:32,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:35,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:39,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:40,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:40,701 INFO L93 Difference]: Finished difference Result 1133 states and 1690 transitions. [2022-12-13 16:10:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:10:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-12-13 16:10:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:40,705 INFO L225 Difference]: With dead ends: 1133 [2022-12-13 16:10:40,705 INFO L226 Difference]: Without dead ends: 1105 [2022-12-13 16:10:40,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:10:40,706 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 293 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 240 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:40,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2328 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 712 Invalid, 2 Unknown, 0 Unchecked, 13.4s Time] [2022-12-13 16:10:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-12-13 16:10:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1022. [2022-12-13 16:10:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 809 states have (on average 1.4239802224969098) internal successors, (1152), 816 states have internal predecessors, (1152), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-12-13 16:10:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1520 transitions. [2022-12-13 16:10:40,762 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1520 transitions. Word has length 49 [2022-12-13 16:10:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:40,763 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 1520 transitions. [2022-12-13 16:10:40,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:10:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1520 transitions. [2022-12-13 16:10:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 16:10:40,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:40,764 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] [2022-12-13 16:10:40,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 16:10:40,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:40,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:40,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2123894719, now seen corresponding path program 1 times [2022-12-13 16:10:40,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:40,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612945474] [2022-12-13 16:10:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:40,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 16:10:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:10:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:40,848 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 16:10:40,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:40,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612945474] [2022-12-13 16:10:40,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612945474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:40,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:40,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:10:40,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464565887] [2022-12-13 16:10:40,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:40,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:40,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:40,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:40,850 INFO L87 Difference]: Start difference. First operand 1022 states and 1520 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:10:46,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:50,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:53,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:55,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:10:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:10:55,614 INFO L93 Difference]: Finished difference Result 1104 states and 1653 transitions. [2022-12-13 16:10:55,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:10:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-12-13 16:10:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:10:55,619 INFO L225 Difference]: With dead ends: 1104 [2022-12-13 16:10:55,619 INFO L226 Difference]: Without dead ends: 1097 [2022-12-13 16:10:55,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:10:55,620 INFO L413 NwaCegarLoop]: 763 mSDtfsCounter, 277 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 228 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:10:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 2321 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 728 Invalid, 4 Unknown, 0 Unchecked, 14.7s Time] [2022-12-13 16:10:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-12-13 16:10:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1034. [2022-12-13 16:10:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 821 states have (on average 1.4202192448233861) internal successors, (1166), 828 states have internal predecessors, (1166), 156 states have call successors, (156), 51 states have call predecessors, (156), 56 states have return successors, (212), 154 states have call predecessors, (212), 150 states have call successors, (212) [2022-12-13 16:10:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1534 transitions. [2022-12-13 16:10:55,679 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1534 transitions. Word has length 49 [2022-12-13 16:10:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:10:55,679 INFO L495 AbstractCegarLoop]: Abstraction has 1034 states and 1534 transitions. [2022-12-13 16:10:55,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:10:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1534 transitions. [2022-12-13 16:10:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 16:10:55,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:10:55,681 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] [2022-12-13 16:10:55,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 16:10:55,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:10:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:10:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash 725085215, now seen corresponding path program 1 times [2022-12-13 16:10:55,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:10:55,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698751847] [2022-12-13 16:10:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:10:55,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:10:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 16:10:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:55,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 16:10:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:10:55,766 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 16:10:55,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:10:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698751847] [2022-12-13 16:10:55,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698751847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:10:55,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:10:55,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:10:55,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010442225] [2022-12-13 16:10:55,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:10:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:10:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:10:55,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:10:55,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:10:55,767 INFO L87 Difference]: Start difference. First operand 1034 states and 1534 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:11:00,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:03,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:05,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:07,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:08,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:09,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:11:09,679 INFO L93 Difference]: Finished difference Result 1172 states and 1735 transitions. [2022-12-13 16:11:09,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:11:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-12-13 16:11:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:11:09,683 INFO L225 Difference]: With dead ends: 1172 [2022-12-13 16:11:09,683 INFO L226 Difference]: Without dead ends: 1098 [2022-12-13 16:11:09,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:11:09,684 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 913 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 250 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:11:09,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1966 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 646 Invalid, 4 Unknown, 0 Unchecked, 13.8s Time] [2022-12-13 16:11:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-12-13 16:11:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1023. [2022-12-13 16:11:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4213759213759214) internal successors, (1157), 821 states have internal predecessors, (1157), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-12-13 16:11:09,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1521 transitions. [2022-12-13 16:11:09,745 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1521 transitions. Word has length 50 [2022-12-13 16:11:09,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:11:09,745 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1521 transitions. [2022-12-13 16:11:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:11:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1521 transitions. [2022-12-13 16:11:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 16:11:09,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:11:09,748 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] [2022-12-13 16:11:09,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 16:11:09,748 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:11:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1407456133, now seen corresponding path program 1 times [2022-12-13 16:11:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:09,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534476092] [2022-12-13 16:11:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:09,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 16:11:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:09,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:11:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:09,930 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 16:11:09,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534476092] [2022-12-13 16:11:09,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534476092] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:09,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:11:09,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 16:11:09,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965498810] [2022-12-13 16:11:09,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:09,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:11:09,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:09,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:11:09,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:11:09,932 INFO L87 Difference]: Start difference. First operand 1023 states and 1521 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:11:17,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:19,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:21,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:22,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:24,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:24,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:11:24,817 INFO L93 Difference]: Finished difference Result 1093 states and 1636 transitions. [2022-12-13 16:11:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:11:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-12-13 16:11:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:11:24,822 INFO L225 Difference]: With dead ends: 1093 [2022-12-13 16:11:24,822 INFO L226 Difference]: Without dead ends: 1088 [2022-12-13 16:11:24,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:11:24,822 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 1122 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 269 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:11:24,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2784 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1123 Invalid, 4 Unknown, 0 Unchecked, 14.7s Time] [2022-12-13 16:11:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-12-13 16:11:24,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1023. [2022-12-13 16:11:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 814 states have (on average 1.4201474201474202) internal successors, (1156), 821 states have internal predecessors, (1156), 154 states have call successors, (154), 49 states have call predecessors, (154), 54 states have return successors, (210), 152 states have call predecessors, (210), 148 states have call successors, (210) [2022-12-13 16:11:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1520 transitions. [2022-12-13 16:11:24,880 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1520 transitions. Word has length 50 [2022-12-13 16:11:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:11:24,880 INFO L495 AbstractCegarLoop]: Abstraction has 1023 states and 1520 transitions. [2022-12-13 16:11:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 5 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:11:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1520 transitions. [2022-12-13 16:11:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 16:11:24,881 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:11:24,882 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] [2022-12-13 16:11:24,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 16:11:24,882 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:11:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:24,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1394050817, now seen corresponding path program 1 times [2022-12-13 16:11:24,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:24,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908000097] [2022-12-13 16:11:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:24,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:25,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-12-13 16:11:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:25,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 16:11:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:25,100 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 16:11:25,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:25,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908000097] [2022-12-13 16:11:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908000097] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:25,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:11:25,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 16:11:25,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811331429] [2022-12-13 16:11:25,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:25,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:11:25,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:11:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:11:25,103 INFO L87 Difference]: Start difference. First operand 1023 states and 1520 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:11:34,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:37,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:39,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:41,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:43,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:45,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:45,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:11:45,614 INFO L93 Difference]: Finished difference Result 1075 states and 1608 transitions. [2022-12-13 16:11:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:11:45,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-12-13 16:11:45,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:11:45,619 INFO L225 Difference]: With dead ends: 1075 [2022-12-13 16:11:45,619 INFO L226 Difference]: Without dead ends: 1060 [2022-12-13 16:11:45,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:11:45,620 INFO L413 NwaCegarLoop]: 786 mSDtfsCounter, 91 mSDsluCounter, 5269 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 102 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6055 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:11:45,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6055 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1628 Invalid, 6 Unknown, 0 Unchecked, 20.4s Time] [2022-12-13 16:11:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-12-13 16:11:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 1021. [2022-12-13 16:11:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 813 states have (on average 1.4194341943419435) internal successors, (1154), 820 states have internal predecessors, (1154), 153 states have call successors, (153), 49 states have call predecessors, (153), 54 states have return successors, (209), 151 states have call predecessors, (209), 147 states have call successors, (209) [2022-12-13 16:11:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1516 transitions. [2022-12-13 16:11:45,684 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1516 transitions. Word has length 53 [2022-12-13 16:11:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:11:45,684 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1516 transitions. [2022-12-13 16:11:45,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 7 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:11:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1516 transitions. [2022-12-13 16:11:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:11:45,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:11:45,686 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] [2022-12-13 16:11:45,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 16:11:45,686 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:11:45,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:11:45,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1869145587, now seen corresponding path program 1 times [2022-12-13 16:11:45,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:11:45,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393850863] [2022-12-13 16:11:45,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:11:45,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:11:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:45,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 16:11:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:45,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 16:11:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:11:45,901 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 16:11:45,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:11:45,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393850863] [2022-12-13 16:11:45,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393850863] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:11:45,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:11:45,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 16:11:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703060042] [2022-12-13 16:11:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:11:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 16:11:45,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:11:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 16:11:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:11:45,903 INFO L87 Difference]: Start difference. First operand 1021 states and 1516 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:11:49,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:53,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:56,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:57,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:11:59,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:01,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:03,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:12:04,162 INFO L93 Difference]: Finished difference Result 1072 states and 1603 transitions. [2022-12-13 16:12:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:12:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-12-13 16:12:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:12:04,167 INFO L225 Difference]: With dead ends: 1072 [2022-12-13 16:12:04,167 INFO L226 Difference]: Without dead ends: 1057 [2022-12-13 16:12:04,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:12:04,168 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 91 mSDsluCounter, 5226 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 101 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6004 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:12:04,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6004 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1619 Invalid, 3 Unknown, 0 Unchecked, 18.1s Time] [2022-12-13 16:12:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-12-13 16:12:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1018. [2022-12-13 16:12:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 811 states have (on average 1.4192355117139335) internal successors, (1151), 818 states have internal predecessors, (1151), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2022-12-13 16:12:04,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1511 transitions. [2022-12-13 16:12:04,233 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1511 transitions. Word has length 51 [2022-12-13 16:12:04,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:12:04,233 INFO L495 AbstractCegarLoop]: Abstraction has 1018 states and 1511 transitions. [2022-12-13 16:12:04,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:12:04,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1511 transitions. [2022-12-13 16:12:04,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 16:12:04,235 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:12:04,235 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] [2022-12-13 16:12:04,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 16:12:04,235 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:12:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash -956966013, now seen corresponding path program 1 times [2022-12-13 16:12:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:04,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611169153] [2022-12-13 16:12:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:04,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 16:12:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-12-13 16:12:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:04,331 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 16:12:04,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:04,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611169153] [2022-12-13 16:12:04,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611169153] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:12:04,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:12:04,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 16:12:04,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847406429] [2022-12-13 16:12:04,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:12:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 16:12:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 16:12:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:12:04,332 INFO L87 Difference]: Start difference. First operand 1018 states and 1511 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:12:07,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:12,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:15,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:17,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:18,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:21,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:12:21,971 INFO L93 Difference]: Finished difference Result 2099 states and 3135 transitions. [2022-12-13 16:12:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:12:21,974 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-12-13 16:12:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:12:21,978 INFO L225 Difference]: With dead ends: 2099 [2022-12-13 16:12:21,978 INFO L226 Difference]: Without dead ends: 1085 [2022-12-13 16:12:21,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:12:21,981 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 248 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 221 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:12:21,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 2339 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 701 Invalid, 4 Unknown, 0 Unchecked, 17.5s Time] [2022-12-13 16:12:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-12-13 16:12:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 1021. [2022-12-13 16:12:22,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 814 states have (on average 1.4176904176904177) internal successors, (1154), 821 states have internal predecessors, (1154), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2022-12-13 16:12:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1514 transitions. [2022-12-13 16:12:22,073 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1514 transitions. Word has length 51 [2022-12-13 16:12:22,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:12:22,073 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1514 transitions. [2022-12-13 16:12:22,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 3 states have internal predecessors, (46), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:12:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1514 transitions. [2022-12-13 16:12:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 16:12:22,075 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:12:22,075 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] [2022-12-13 16:12:22,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 16:12:22,075 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:12:22,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2088131427, now seen corresponding path program 1 times [2022-12-13 16:12:22,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:22,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739756087] [2022-12-13 16:12:22,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:22,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:22,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 16:12:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:22,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 16:12:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:12:22,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739756087] [2022-12-13 16:12:22,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739756087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:12:22,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415101117] [2022-12-13 16:12:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:12:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:12:22,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:12:22,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:12:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 16:12:22,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:12:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:12:22,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:12:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 16:12:22,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415101117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:12:22,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:12:22,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-12-13 16:12:22,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157183992] [2022-12-13 16:12:22,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:12:22,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 16:12:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:22,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 16:12:22,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-13 16:12:22,655 INFO L87 Difference]: Start difference. First operand 1021 states and 1514 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:12:29,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:30,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:33,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:35,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:37,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:38,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:40,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:12:40,652 INFO L93 Difference]: Finished difference Result 2116 states and 3157 transitions. [2022-12-13 16:12:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 16:12:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-12-13 16:12:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:12:40,657 INFO L225 Difference]: With dead ends: 2116 [2022-12-13 16:12:40,657 INFO L226 Difference]: Without dead ends: 1100 [2022-12-13 16:12:40,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:12:40,659 INFO L413 NwaCegarLoop]: 752 mSDtfsCounter, 264 mSDsluCounter, 3660 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 237 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:12:40,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 4412 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1209 Invalid, 4 Unknown, 0 Unchecked, 17.8s Time] [2022-12-13 16:12:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-12-13 16:12:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1035. [2022-12-13 16:12:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 828 states have (on average 1.4106280193236715) internal successors, (1168), 835 states have internal predecessors, (1168), 152 states have call successors, (152), 49 states have call predecessors, (152), 54 states have return successors, (208), 150 states have call predecessors, (208), 146 states have call successors, (208) [2022-12-13 16:12:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1528 transitions. [2022-12-13 16:12:40,726 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1528 transitions. Word has length 57 [2022-12-13 16:12:40,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:12:40,726 INFO L495 AbstractCegarLoop]: Abstraction has 1035 states and 1528 transitions. [2022-12-13 16:12:40,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 7 states have internal predecessors, (66), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:12:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1528 transitions. [2022-12-13 16:12:40,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 16:12:40,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:12:40,727 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-12-13 16:12:40,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:12:40,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 16:12:40,929 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:12:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1053556911, now seen corresponding path program 2 times [2022-12-13 16:12:40,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:40,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392727456] [2022-12-13 16:12:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:41,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 16:12:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:41,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 16:12:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 16:12:41,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:41,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392727456] [2022-12-13 16:12:41,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392727456] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:12:41,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353817589] [2022-12-13 16:12:41,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:12:41,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:12:41,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:12:41,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:12:41,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:12:41,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 16:12:41,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:12:41,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:12:41,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:12:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 16:12:41,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:12:41,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353817589] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:12:41,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 16:12:41,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-12-13 16:12:41,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132046762] [2022-12-13 16:12:41,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:12:41,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:12:41,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:41,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:12:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:12:41,623 INFO L87 Difference]: Start difference. First operand 1035 states and 1528 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:12:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:12:41,779 INFO L93 Difference]: Finished difference Result 1793 states and 2708 transitions. [2022-12-13 16:12:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:12:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-12-13 16:12:41,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:12:41,782 INFO L225 Difference]: With dead ends: 1793 [2022-12-13 16:12:41,782 INFO L226 Difference]: Without dead ends: 1044 [2022-12-13 16:12:41,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:12:41,784 INFO L413 NwaCegarLoop]: 841 mSDtfsCounter, 2 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:12:41,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2508 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:12:41,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-12-13 16:12:41,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 1044. [2022-12-13 16:12:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 835 states have (on average 1.4095808383233532) internal successors, (1177), 844 states have internal predecessors, (1177), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2022-12-13 16:12:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1539 transitions. [2022-12-13 16:12:41,855 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1539 transitions. Word has length 71 [2022-12-13 16:12:41,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:12:41,855 INFO L495 AbstractCegarLoop]: Abstraction has 1044 states and 1539 transitions. [2022-12-13 16:12:41,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:12:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1539 transitions. [2022-12-13 16:12:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 16:12:41,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:12:41,857 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2022-12-13 16:12:41,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 16:12:42,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 16:12:42,058 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:12:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:42,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1654004804, now seen corresponding path program 1 times [2022-12-13 16:12:42,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:42,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585172806] [2022-12-13 16:12:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:42,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 16:12:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:42,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 16:12:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 16:12:42,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585172806] [2022-12-13 16:12:42,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585172806] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:12:42,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509750242] [2022-12-13 16:12:42,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:42,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:12:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:12:42,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:12:42,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:12:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:42,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 16:12:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:12:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-13 16:12:42,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:12:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 16:12:42,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509750242] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:12:42,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:12:42,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2022-12-13 16:12:42,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492490837] [2022-12-13 16:12:42,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:12:42,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:12:42,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:12:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:12:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:12:42,772 INFO L87 Difference]: Start difference. First operand 1044 states and 1539 transitions. Second operand has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:12:49,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:51,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:53,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:56,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:58,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:12:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:12:58,474 INFO L93 Difference]: Finished difference Result 2153 states and 3181 transitions. [2022-12-13 16:12:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 16:12:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2022-12-13 16:12:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:12:58,478 INFO L225 Difference]: With dead ends: 2153 [2022-12-13 16:12:58,478 INFO L226 Difference]: Without dead ends: 1120 [2022-12-13 16:12:58,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-12-13 16:12:58,480 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 275 mSDsluCounter, 3662 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 250 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 4415 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:12:58,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 4415 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1321 Invalid, 4 Unknown, 0 Unchecked, 15.5s Time] [2022-12-13 16:12:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-12-13 16:12:58,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1072. [2022-12-13 16:12:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 863 states have (on average 1.3962920046349943) internal successors, (1205), 872 states have internal predecessors, (1205), 152 states have call successors, (152), 49 states have call predecessors, (152), 56 states have return successors, (210), 150 states have call predecessors, (210), 146 states have call successors, (210) [2022-12-13 16:12:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1567 transitions. [2022-12-13 16:12:58,553 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1567 transitions. Word has length 72 [2022-12-13 16:12:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:12:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1567 transitions. [2022-12-13 16:12:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.083333333333333) internal successors, (85), 10 states have internal predecessors, (85), 1 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:12:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1567 transitions. [2022-12-13 16:12:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 16:12:58,555 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:12:58,555 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:12:58,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:12:58,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 16:12:58,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:12:58,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:12:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -306284904, now seen corresponding path program 2 times [2022-12-13 16:12:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:12:58,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180029730] [2022-12-13 16:12:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:12:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:12:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:59,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 16:12:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:59,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-12-13 16:12:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:12:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-12-13 16:12:59,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:12:59,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180029730] [2022-12-13 16:12:59,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180029730] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:12:59,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652140611] [2022-12-13 16:12:59,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:12:59,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:12:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:12:59,208 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:12:59,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:12:59,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:12:59,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:13:00,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 16:13:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:13:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-12-13 16:13:00,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:13:00,149 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-12-13 16:13:00,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652140611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:13:00,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:13:00,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 5] total 19 [2022-12-13 16:13:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664633603] [2022-12-13 16:13:00,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:13:00,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 16:13:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:00,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 16:13:00,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-12-13 16:13:00,151 INFO L87 Difference]: Start difference. First operand 1072 states and 1567 transitions. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 16:13:10,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:13,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:15,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:17,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:20,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:20,901 INFO L93 Difference]: Finished difference Result 2211 states and 3265 transitions. [2022-12-13 16:13:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 16:13:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 100 [2022-12-13 16:13:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:20,904 INFO L225 Difference]: With dead ends: 2211 [2022-12-13 16:13:20,904 INFO L226 Difference]: Without dead ends: 1152 [2022-12-13 16:13:20,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:13:20,906 INFO L413 NwaCegarLoop]: 742 mSDtfsCounter, 287 mSDsluCounter, 7806 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 289 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 8548 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:20,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 8548 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2884 Invalid, 4 Unknown, 0 Unchecked, 20.4s Time] [2022-12-13 16:13:20,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-12-13 16:13:20,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1099. [2022-12-13 16:13:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 888 states have (on average 1.3986486486486487) internal successors, (1242), 897 states have internal predecessors, (1242), 152 states have call successors, (152), 51 states have call predecessors, (152), 58 states have return successors, (212), 150 states have call predecessors, (212), 146 states have call successors, (212) [2022-12-13 16:13:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1606 transitions. [2022-12-13 16:13:20,983 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1606 transitions. Word has length 100 [2022-12-13 16:13:20,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:20,983 INFO L495 AbstractCegarLoop]: Abstraction has 1099 states and 1606 transitions. [2022-12-13 16:13:20,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 17 states have internal predecessors, (103), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 16:13:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1606 transitions. [2022-12-13 16:13:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 16:13:20,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:20,985 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:13:20,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 16:13:21,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:13:21,187 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:21,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1599609908, now seen corresponding path program 1 times [2022-12-13 16:13:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:21,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479006711] [2022-12-13 16:13:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:21,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-12-13 16:13:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:21,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 16:13:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-12-13 16:13:21,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479006711] [2022-12-13 16:13:21,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479006711] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:21,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:21,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 16:13:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67245225] [2022-12-13 16:13:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:21,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 16:13:21,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 16:13:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:13:21,526 INFO L87 Difference]: Start difference. First operand 1099 states and 1606 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:13:24,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:30,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:33,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:35,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:37,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:40,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:13:40,814 INFO L93 Difference]: Finished difference Result 1141 states and 1661 transitions. [2022-12-13 16:13:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 16:13:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 108 [2022-12-13 16:13:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:13:40,818 INFO L225 Difference]: With dead ends: 1141 [2022-12-13 16:13:40,818 INFO L226 Difference]: Without dead ends: 1124 [2022-12-13 16:13:40,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 16:13:40,818 INFO L413 NwaCegarLoop]: 776 mSDtfsCounter, 102 mSDsluCounter, 6026 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 100 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 6802 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:13:40,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 6802 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1667 Invalid, 5 Unknown, 0 Unchecked, 19.1s Time] [2022-12-13 16:13:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-12-13 16:13:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1096. [2022-12-13 16:13:40,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 886 states have (on average 1.3984198645598194) internal successors, (1239), 895 states have internal predecessors, (1239), 151 states have call successors, (151), 51 states have call predecessors, (151), 58 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2022-12-13 16:13:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1601 transitions. [2022-12-13 16:13:40,897 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1601 transitions. Word has length 108 [2022-12-13 16:13:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:13:40,897 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1601 transitions. [2022-12-13 16:13:40,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 8 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:13:40,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1601 transitions. [2022-12-13 16:13:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-12-13 16:13:40,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:13:40,898 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:13:40,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 16:13:40,899 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:13:40,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:13:40,899 INFO L85 PathProgramCache]: Analyzing trace with hash 444894614, now seen corresponding path program 1 times [2022-12-13 16:13:40,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:13:40,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756936311] [2022-12-13 16:13:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:13:40,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:13:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:41,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-12-13 16:13:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-12-13 16:13:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:41,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 16:13:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:41,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-12-13 16:13:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:13:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-12-13 16:13:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:13:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756936311] [2022-12-13 16:13:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756936311] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:13:41,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:13:41,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:13:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306122407] [2022-12-13 16:13:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:13:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:13:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:13:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:13:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:13:41,043 INFO L87 Difference]: Start difference. First operand 1096 states and 1601 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:13:46,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:48,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:50,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:52,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:54,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:56,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:13:59,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:00,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:00,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:00,289 INFO L93 Difference]: Finished difference Result 1634 states and 2387 transitions. [2022-12-13 16:14:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:14:00,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 113 [2022-12-13 16:14:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:00,294 INFO L225 Difference]: With dead ends: 1634 [2022-12-13 16:14:00,294 INFO L226 Difference]: Without dead ends: 1143 [2022-12-13 16:14:00,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-13 16:14:00,296 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 470 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 316 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:00,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 2858 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 851 Invalid, 6 Unknown, 0 Unchecked, 19.1s Time] [2022-12-13 16:14:00,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-12-13 16:14:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1098. [2022-12-13 16:14:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 888 states have (on average 1.3941441441441442) internal successors, (1238), 897 states have internal predecessors, (1238), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (213), 149 states have call predecessors, (213), 145 states have call successors, (213) [2022-12-13 16:14:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1601 transitions. [2022-12-13 16:14:00,395 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1601 transitions. Word has length 113 [2022-12-13 16:14:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:00,395 INFO L495 AbstractCegarLoop]: Abstraction has 1098 states and 1601 transitions. [2022-12-13 16:14:00,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:14:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1601 transitions. [2022-12-13 16:14:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-13 16:14:00,396 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:00,397 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:14:00,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 16:14:00,397 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2058986579, now seen corresponding path program 3 times [2022-12-13 16:14:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:00,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763673170] [2022-12-13 16:14:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:00,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:00,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-12-13 16:14:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:00,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-12-13 16:14:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-12-13 16:14:00,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:00,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763673170] [2022-12-13 16:14:00,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763673170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:14:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134706776] [2022-12-13 16:14:00,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:14:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:14:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:14:00,843 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:14:00,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:14:02,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 16:14:02,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:14:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 16:14:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:14:03,065 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-12-13 16:14:03,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:14:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-12-13 16:14:03,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134706776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:14:03,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:14:03,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 26 [2022-12-13 16:14:03,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759553272] [2022-12-13 16:14:03,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:14:03,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 16:14:03,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:03,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 16:14:03,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-12-13 16:14:03,277 INFO L87 Difference]: Start difference. First operand 1098 states and 1601 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 16:14:13,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:17,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:19,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:21,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:24,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:25,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:27,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:29,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:29,245 INFO L93 Difference]: Finished difference Result 2294 states and 3398 transitions. [2022-12-13 16:14:29,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 16:14:29,247 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 109 [2022-12-13 16:14:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:29,249 INFO L225 Difference]: With dead ends: 2294 [2022-12-13 16:14:29,249 INFO L226 Difference]: Without dead ends: 1195 [2022-12-13 16:14:29,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=427, Invalid=1925, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 16:14:29,251 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 306 mSDsluCounter, 10484 mSDsCounter, 0 mSdLazyCounter, 4051 mSolverCounterSat, 324 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 11219 SdHoareTripleChecker+Invalid, 4377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 4051 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:29,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 11219 Invalid, 4377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 4051 Invalid, 2 Unknown, 0 Unchecked, 25.1s Time] [2022-12-13 16:14:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-12-13 16:14:29,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1131. [2022-12-13 16:14:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 921 states have (on average 1.3973941368078175) internal successors, (1287), 930 states have internal predecessors, (1287), 150 states have call successors, (150), 51 states have call predecessors, (150), 59 states have return successors, (211), 149 states have call predecessors, (211), 145 states have call successors, (211) [2022-12-13 16:14:29,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1648 transitions. [2022-12-13 16:14:29,349 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1648 transitions. Word has length 109 [2022-12-13 16:14:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:29,349 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1648 transitions. [2022-12-13 16:14:29,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 24 states have internal predecessors, (110), 2 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 16:14:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1648 transitions. [2022-12-13 16:14:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-13 16:14:29,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:29,350 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:14:29,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 16:14:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 16:14:29,551 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash -207204572, now seen corresponding path program 1 times [2022-12-13 16:14:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697657050] [2022-12-13 16:14:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:29,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 16:14:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:29,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 16:14:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 16:14:29,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:29,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697657050] [2022-12-13 16:14:29,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697657050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:29,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:29,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 16:14:29,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116048538] [2022-12-13 16:14:29,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:29,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:14:29,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:14:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:14:29,965 INFO L87 Difference]: Start difference. First operand 1131 states and 1648 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:14:39,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:42,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:43,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:45,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:47,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:48,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:14:48,649 INFO L93 Difference]: Finished difference Result 1173 states and 1703 transitions. [2022-12-13 16:14:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:14:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 115 [2022-12-13 16:14:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:14:48,653 INFO L225 Difference]: With dead ends: 1173 [2022-12-13 16:14:48,653 INFO L226 Difference]: Without dead ends: 1156 [2022-12-13 16:14:48,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:14:48,654 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 114 mSDsluCounter, 6612 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 98 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 7371 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2022-12-13 16:14:48,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 7371 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1816 Invalid, 2 Unknown, 0 Unchecked, 18.5s Time] [2022-12-13 16:14:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-12-13 16:14:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1128. [2022-12-13 16:14:48,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 919 states have (on average 1.397170837867247) internal successors, (1284), 928 states have internal predecessors, (1284), 149 states have call successors, (149), 51 states have call predecessors, (149), 59 states have return successors, (210), 148 states have call predecessors, (210), 144 states have call successors, (210) [2022-12-13 16:14:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1643 transitions. [2022-12-13 16:14:48,736 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1643 transitions. Word has length 115 [2022-12-13 16:14:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:14:48,740 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1643 transitions. [2022-12-13 16:14:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 9 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:14:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1643 transitions. [2022-12-13 16:14:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-13 16:14:48,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:14:48,741 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:14:48,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 16:14:48,741 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:14:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:14:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2121024877, now seen corresponding path program 1 times [2022-12-13 16:14:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:14:48,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929253256] [2022-12-13 16:14:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:14:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:14:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:48,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 16:14:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:48,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-12-13 16:14:48,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:14:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 16:14:48,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:14:48,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929253256] [2022-12-13 16:14:48,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929253256] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:14:48,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:14:48,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 16:14:48,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100743966] [2022-12-13 16:14:48,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:14:48,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:14:48,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:14:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:14:48,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:14:48,903 INFO L87 Difference]: Start difference. First operand 1128 states and 1643 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:14:53,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:55,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:14:57,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:00,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:01,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:03,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:03,468 INFO L93 Difference]: Finished difference Result 1219 states and 1757 transitions. [2022-12-13 16:15:03,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 16:15:03,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-12-13 16:15:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:03,472 INFO L225 Difference]: With dead ends: 1219 [2022-12-13 16:15:03,472 INFO L226 Difference]: Without dead ends: 1185 [2022-12-13 16:15:03,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 16:15:03,472 INFO L413 NwaCegarLoop]: 798 mSDtfsCounter, 1101 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 236 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:03,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 1822 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 791 Invalid, 4 Unknown, 0 Unchecked, 14.4s Time] [2022-12-13 16:15:03,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2022-12-13 16:15:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1128. [2022-12-13 16:15:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 919 states have (on average 1.396082698585419) internal successors, (1283), 928 states have internal predecessors, (1283), 149 states have call successors, (149), 51 states have call predecessors, (149), 59 states have return successors, (210), 148 states have call predecessors, (210), 144 states have call successors, (210) [2022-12-13 16:15:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1642 transitions. [2022-12-13 16:15:03,576 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1642 transitions. Word has length 116 [2022-12-13 16:15:03,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:03,576 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 1642 transitions. [2022-12-13 16:15:03,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 16:15:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1642 transitions. [2022-12-13 16:15:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-13 16:15:03,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:03,578 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 16:15:03,578 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:15:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:03,578 INFO L85 PathProgramCache]: Analyzing trace with hash 472872621, now seen corresponding path program 1 times [2022-12-13 16:15:03,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:03,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063548709] [2022-12-13 16:15:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:03,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:03,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 16:15:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:03,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 16:15:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 16:15:03,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:03,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063548709] [2022-12-13 16:15:03,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063548709] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:15:03,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:15:03,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 16:15:03,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270650512] [2022-12-13 16:15:03,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:15:03,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:15:03,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:15:03,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:15:03,915 INFO L87 Difference]: Start difference. First operand 1128 states and 1642 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:15:12,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:14,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:16,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:19,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:20,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:22,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:22,862 INFO L93 Difference]: Finished difference Result 1170 states and 1697 transitions. [2022-12-13 16:15:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:15:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2022-12-13 16:15:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:22,865 INFO L225 Difference]: With dead ends: 1170 [2022-12-13 16:15:22,866 INFO L226 Difference]: Without dead ends: 1153 [2022-12-13 16:15:22,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-12-13 16:15:22,866 INFO L413 NwaCegarLoop]: 756 mSDtfsCounter, 114 mSDsluCounter, 6594 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 97 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 7350 SdHoareTripleChecker+Invalid, 1904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:22,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 7350 Invalid, 1904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1805 Invalid, 2 Unknown, 0 Unchecked, 18.7s Time] [2022-12-13 16:15:22,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-12-13 16:15:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1125. [2022-12-13 16:15:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 917 states have (on average 1.395856052344602) internal successors, (1280), 926 states have internal predecessors, (1280), 148 states have call successors, (148), 51 states have call predecessors, (148), 59 states have return successors, (209), 147 states have call predecessors, (209), 143 states have call successors, (209) [2022-12-13 16:15:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1637 transitions. [2022-12-13 16:15:22,955 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1637 transitions. Word has length 116 [2022-12-13 16:15:22,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:22,955 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 1637 transitions. [2022-12-13 16:15:22,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 16:15:22,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1637 transitions. [2022-12-13 16:15:22,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 16:15:22,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:22,957 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 16:15:22,957 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:15:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1387803207, now seen corresponding path program 1 times [2022-12-13 16:15:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933344203] [2022-12-13 16:15:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:23,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 16:15:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:23,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-12-13 16:15:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:23,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 16:15:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:23,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 16:15:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 16:15:23,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:23,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933344203] [2022-12-13 16:15:23,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933344203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:15:23,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:15:23,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 16:15:23,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225181862] [2022-12-13 16:15:23,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:15:23,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 16:15:23,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 16:15:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 16:15:23,230 INFO L87 Difference]: Start difference. First operand 1125 states and 1637 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 16:15:29,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:31,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:33,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:36,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:38,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:41,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:46,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:48,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:51,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:52,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:53,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:55,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:57,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:15:57,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:15:57,936 INFO L93 Difference]: Finished difference Result 2321 states and 3411 transitions. [2022-12-13 16:15:57,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 16:15:57,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-12-13 16:15:57,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:15:57,940 INFO L225 Difference]: With dead ends: 2321 [2022-12-13 16:15:57,940 INFO L226 Difference]: Without dead ends: 1882 [2022-12-13 16:15:57,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2022-12-13 16:15:57,941 INFO L413 NwaCegarLoop]: 975 mSDtfsCounter, 2114 mSDsluCounter, 2960 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 563 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2203 SdHoareTripleChecker+Valid, 3935 SdHoareTripleChecker+Invalid, 2890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.3s IncrementalHoareTripleChecker+Time [2022-12-13 16:15:57,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2203 Valid, 3935 Invalid, 2890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 2317 Invalid, 10 Unknown, 0 Unchecked, 34.3s Time] [2022-12-13 16:15:57,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-12-13 16:15:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1200. [2022-12-13 16:15:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 977 states have (on average 1.3868986693961105) internal successors, (1355), 986 states have internal predecessors, (1355), 155 states have call successors, (155), 56 states have call predecessors, (155), 67 states have return successors, (224), 157 states have call predecessors, (224), 150 states have call successors, (224) [2022-12-13 16:15:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1734 transitions. [2022-12-13 16:15:58,061 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1734 transitions. Word has length 124 [2022-12-13 16:15:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:15:58,062 INFO L495 AbstractCegarLoop]: Abstraction has 1200 states and 1734 transitions. [2022-12-13 16:15:58,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 4 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 16:15:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1734 transitions. [2022-12-13 16:15:58,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 16:15:58,063 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:15:58,063 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:58,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 16:15:58,063 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:15:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:15:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 171468368, now seen corresponding path program 1 times [2022-12-13 16:15:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:15:58,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001049312] [2022-12-13 16:15:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:15:58,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:15:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:58,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 16:15:58,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:58,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-12-13 16:15:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-12-13 16:15:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:15:58,368 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-12-13 16:15:58,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:15:58,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001049312] [2022-12-13 16:15:58,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001049312] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:15:58,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:15:58,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 16:15:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069135871] [2022-12-13 16:15:58,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:15:58,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 16:15:58,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:15:58,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 16:15:58,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 16:15:58,369 INFO L87 Difference]: Start difference. First operand 1200 states and 1734 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:16:04,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:07,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:08,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:10,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:14,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:17,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:19,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:19,490 INFO L93 Difference]: Finished difference Result 1429 states and 2107 transitions. [2022-12-13 16:16:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 16:16:19,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 121 [2022-12-13 16:16:19,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:19,493 INFO L225 Difference]: With dead ends: 1429 [2022-12-13 16:16:19,494 INFO L226 Difference]: Without dead ends: 1329 [2022-12-13 16:16:19,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-12-13 16:16:19,494 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 233 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 137 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 3154 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:19,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 3154 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1435 Invalid, 6 Unknown, 0 Unchecked, 20.9s Time] [2022-12-13 16:16:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-12-13 16:16:19,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1216. [2022-12-13 16:16:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 989 states have (on average 1.3862487360970677) internal successors, (1371), 1000 states have internal predecessors, (1371), 156 states have call successors, (156), 56 states have call predecessors, (156), 70 states have return successors, (250), 159 states have call predecessors, (250), 151 states have call successors, (250) [2022-12-13 16:16:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1777 transitions. [2022-12-13 16:16:19,603 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1777 transitions. Word has length 121 [2022-12-13 16:16:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:19,603 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1777 transitions. [2022-12-13 16:16:19,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 16:16:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1777 transitions. [2022-12-13 16:16:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 16:16:19,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:19,605 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:19,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 16:16:19,605 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:16:19,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2094696402, now seen corresponding path program 1 times [2022-12-13 16:16:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:19,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812097954] [2022-12-13 16:16:19,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:19,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:20,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 16:16:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:20,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-12-13 16:16:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:20,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-12-13 16:16:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-12-13 16:16:20,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:20,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812097954] [2022-12-13 16:16:20,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812097954] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:20,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311809445] [2022-12-13 16:16:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:20,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:20,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:20,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:20,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:16:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 16:16:20,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-12-13 16:16:20,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-12-13 16:16:21,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311809445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:16:21,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:16:21,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 28 [2022-12-13 16:16:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457173907] [2022-12-13 16:16:21,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:16:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 16:16:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 16:16:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-12-13 16:16:21,186 INFO L87 Difference]: Start difference. First operand 1216 states and 1777 transitions. Second operand has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 25 states have internal predecessors, (141), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 16:16:36,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:38,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:40,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:41,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:44,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:46,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:48,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:16:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:16:48,813 INFO L93 Difference]: Finished difference Result 2521 states and 3689 transitions. [2022-12-13 16:16:48,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 16:16:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 25 states have internal predecessors, (141), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 121 [2022-12-13 16:16:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:16:48,818 INFO L225 Difference]: With dead ends: 2521 [2022-12-13 16:16:48,818 INFO L226 Difference]: Without dead ends: 1328 [2022-12-13 16:16:48,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=453, Invalid=1029, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 16:16:48,820 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 420 mSDsluCounter, 8895 mSDsCounter, 0 mSdLazyCounter, 3687 mSolverCounterSat, 320 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 9627 SdHoareTripleChecker+Invalid, 4011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 3687 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:16:48,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 9627 Invalid, 4011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 3687 Invalid, 4 Unknown, 0 Unchecked, 22.8s Time] [2022-12-13 16:16:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2022-12-13 16:16:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1244. [2022-12-13 16:16:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1017 states have (on average 1.375614552605703) internal successors, (1399), 1028 states have internal predecessors, (1399), 156 states have call successors, (156), 56 states have call predecessors, (156), 70 states have return successors, (250), 159 states have call predecessors, (250), 151 states have call successors, (250) [2022-12-13 16:16:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1805 transitions. [2022-12-13 16:16:48,939 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1805 transitions. Word has length 121 [2022-12-13 16:16:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:16:48,939 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 1805 transitions. [2022-12-13 16:16:48,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.035714285714286) internal successors, (141), 25 states have internal predecessors, (141), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 16:16:48,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1805 transitions. [2022-12-13 16:16:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-13 16:16:48,940 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:16:48,940 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 11, 11, 11, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:16:48,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:16:49,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 16:16:49,142 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:16:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:16:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1873238602, now seen corresponding path program 2 times [2022-12-13 16:16:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:16:49,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071804718] [2022-12-13 16:16:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:16:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:16:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:49,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-12-13 16:16:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:49,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-12-13 16:16:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:49,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-12-13 16:16:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:16:49,801 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-12-13 16:16:49,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:16:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071804718] [2022-12-13 16:16:49,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071804718] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:16:49,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121501716] [2022-12-13 16:16:49,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:16:49,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:16:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:16:49,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:16:49,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:16:57,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:16:57,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:16:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 16:16:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:16:57,585 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-12-13 16:16:57,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:16:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2022-12-13 16:16:57,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121501716] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:16:57,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 16:16:57,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 30 [2022-12-13 16:16:57,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544988453] [2022-12-13 16:16:57,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 16:16:57,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 16:16:57,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:16:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 16:16:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-12-13 16:16:57,919 INFO L87 Difference]: Start difference. First operand 1244 states and 1805 transitions. Second operand has 30 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 27 states have internal predecessors, (116), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 16:17:13,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:16,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:18,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:20,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:23,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:25,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:27,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 16:17:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:17:27,226 INFO L93 Difference]: Finished difference Result 2577 states and 3746 transitions. [2022-12-13 16:17:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 16:17:27,227 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 27 states have internal predecessors, (116), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 149 [2022-12-13 16:17:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:17:27,230 INFO L225 Difference]: With dead ends: 2577 [2022-12-13 16:17:27,230 INFO L226 Difference]: Without dead ends: 1358 [2022-12-13 16:17:27,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=529, Invalid=1193, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 16:17:27,232 INFO L413 NwaCegarLoop]: 729 mSDtfsCounter, 606 mSDsluCounter, 8901 mSDsCounter, 0 mSdLazyCounter, 3799 mSolverCounterSat, 580 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 9630 SdHoareTripleChecker+Invalid, 4382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 3799 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2022-12-13 16:17:27,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 9630 Invalid, 4382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 3799 Invalid, 3 Unknown, 0 Unchecked, 23.8s Time] [2022-12-13 16:17:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-12-13 16:17:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1276. [2022-12-13 16:17:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1049 states have (on average 1.3641563393708294) internal successors, (1431), 1060 states have internal predecessors, (1431), 156 states have call successors, (156), 56 states have call predecessors, (156), 70 states have return successors, (250), 159 states have call predecessors, (250), 151 states have call successors, (250) [2022-12-13 16:17:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1837 transitions. [2022-12-13 16:17:27,349 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1837 transitions. Word has length 149 [2022-12-13 16:17:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:17:27,349 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 1837 transitions. [2022-12-13 16:17:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 27 states have internal predecessors, (116), 1 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 16:17:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1837 transitions. [2022-12-13 16:17:27,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-13 16:17:27,351 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:17:27,351 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 12, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:17:27,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 16:17:27,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 16:17:27,553 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:17:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:17:27,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1777165738, now seen corresponding path program 3 times [2022-12-13 16:17:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:17:27,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337933623] [2022-12-13 16:17:27,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:17:27,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:17:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:28,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-12-13 16:17:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:28,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-12-13 16:17:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:28,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-12-13 16:17:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:17:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2022-12-13 16:17:28,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:17:28,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337933623] [2022-12-13 16:17:28,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337933623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 16:17:28,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381228913] [2022-12-13 16:17:28,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:17:28,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:17:28,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:17:28,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:17:28,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fdc709c-4593-4f1e-88f1-5858679f80e5/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process