./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/diskperf.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_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/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_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/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_96bbfb66-f7f6-4b65-8884-e863a117212b/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 f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 --- 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 13:07:39,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:07:39,085 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:07:39,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:07:39,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:07:39,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:07:39,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:07:39,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:07:39,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:07:39,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:07:39,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:07:39,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:07:39,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:07:39,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:07:39,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:07:39,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:07:39,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:07:39,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:07:39,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:07:39,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:07:39,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:07:39,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:07:39,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:07:39,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:07:39,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:07:39,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:07:39,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:07:39,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:07:39,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:07:39,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:07:39,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:07:39,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:07:39,118 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:07:39,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:07:39,119 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:07:39,120 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:07:39,120 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:07:39,120 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:07:39,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:07:39,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:07:39,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:07:39,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 13:07:39,146 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:07:39,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:07:39,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:07:39,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:07:39,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:07:39,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:07:39,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:07:39,148 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:07:39,148 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:07:39,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:07:39,149 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:07:39,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:07:39,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:07:39,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:07:39,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 13:07:39,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:07:39,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 13:07:39,150 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:07:39,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 13:07:39,150 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:07:39,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 13:07:39,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:07:39,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:07:39,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:07:39,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:07:39,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:07:39,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:07:39,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 13:07:39,152 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:07:39,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:07:39,152 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:07:39,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 13:07:39,153 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:07:39,153 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:07:39,153 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:07:39,153 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_96bbfb66-f7f6-4b65-8884-e863a117212b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f0996d70f204c5713a65b04e25037e48d7532ec1ba0c10162e12c5c0d518b4e3 [2022-12-13 13:07:39,318 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:07:39,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:07:39,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:07:39,342 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:07:39,342 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:07:39,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2022-12-13 13:07:41,969 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:07:42,249 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:07:42,250 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c [2022-12-13 13:07:42,269 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/data/b5af2aa33/9c8f4f408cc64f3badae8119f78f7c88/FLAG83565d6dc [2022-12-13 13:07:42,282 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/data/b5af2aa33/9c8f4f408cc64f3badae8119f78f7c88 [2022-12-13 13:07:42,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:07:42,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:07:42,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:07:42,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:07:42,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:07:42,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:07:42" (1/1) ... [2022-12-13 13:07:42,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f89120f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:42, skipping insertion in model container [2022-12-13 13:07:42,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:07:42" (1/1) ... [2022-12-13 13:07:42,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:07:42,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:07:42,814 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_96bbfb66-f7f6-4b65-8884-e863a117212b/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c[84645,84658] [2022-12-13 13:07:42,976 WARN L623 FunctionHandler]: Unknown extern function swprintf [2022-12-13 13:07:43,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:07:43,113 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:07:43,150 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_96bbfb66-f7f6-4b65-8884-e863a117212b/sv-benchmarks/c/ntdrivers/diskperf.i.cil-1.c[84645,84658] [2022-12-13 13:07:43,183 WARN L623 FunctionHandler]: Unknown extern function swprintf [2022-12-13 13:07:43,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:07:43,279 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:07:43,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43 WrapperNode [2022-12-13 13:07:43,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:07:43,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:07:43,280 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:07:43,280 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:07:43,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,439 INFO L138 Inliner]: procedures = 127, calls = 1459, calls flagged for inlining = 20, calls inlined = 18, statements flattened = 3749 [2022-12-13 13:07:43,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:07:43,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:07:43,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:07:43,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:07:43,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,599 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,608 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:07:43,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:07:43,623 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:07:43,623 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:07:43,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (1/1) ... [2022-12-13 13:07:43,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:07:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:07:43,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:07:43,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:07:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-12-13 13:07:43,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-13 13:07:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-13 13:07:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 13:07:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-12-13 13:07:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-12-13 13:07:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfSendToNextDriver [2022-12-13 13:07:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfSendToNextDriver [2022-12-13 13:07:43,680 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-12-13 13:07:43,680 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-12-13 13:07:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfAddCounters [2022-12-13 13:07:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfAddCounters [2022-12-13 13:07:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-12-13 13:07:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-12-13 13:07:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedDecrement [2022-12-13 13:07:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedDecrement [2022-12-13 13:07:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure IoWMIRegistrationControl [2022-12-13 13:07:43,681 INFO L138 BoogieDeclarations]: Found implementation of procedure IoWMIRegistrationControl [2022-12-13 13:07:43,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 13:07:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-12-13 13:07:43,682 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-12-13 13:07:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-13 13:07:43,682 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-13 13:07:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-12-13 13:07:43,682 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-12-13 13:07:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:07:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:07:43,682 INFO L130 BoogieDeclarations]: Found specification of procedure KeQuerySystemTime [2022-12-13 13:07:43,682 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQuerySystemTime [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-12-13 13:07:43,683 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2022-12-13 13:07:43,683 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:07:43,683 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfLogError [2022-12-13 13:07:43,683 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfLogError [2022-12-13 13:07:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 13:07:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure KeQueryPerformanceCounter [2022-12-13 13:07:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure KeQueryPerformanceCounter [2022-12-13 13:07:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedIncrement [2022-12-13 13:07:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedIncrement [2022-12-13 13:07:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-12-13 13:07:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-12-13 13:07:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-12-13 13:07:43,684 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-12-13 13:07:43,684 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2022-12-13 13:07:43,685 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2022-12-13 13:07:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 13:07:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2022-12-13 13:07:43,685 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2022-12-13 13:07:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-12-13 13:07:43,685 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-12-13 13:07:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-12-13 13:07:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-12-13 13:07:43,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-12-13 13:07:43,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:07:43,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:07:44,142 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:07:44,144 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:07:44,285 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 13:07:44,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-12-13 13:07:44,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-12-13 13:07:44,372 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 13:07:44,386 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-12-13 13:07:44,386 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-12-13 13:07:44,711 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 13:07:44,736 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-12-13 13:07:44,737 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-12-13 13:07:44,862 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 13:07:44,865 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 13:07:44,870 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-13 13:08:31,185 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##61: assume false; [2022-12-13 13:08:31,186 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##62: assume !false; [2022-12-13 13:08:31,186 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##129: assume !false; [2022-12-13 13:08:31,186 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##128: assume false; [2022-12-13 13:08:31,186 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume !false; [2022-12-13 13:08:31,186 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##34: assume false; [2022-12-13 13:08:31,199 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:08:31,205 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:08:31,205 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 13:08:31,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:08:31 BoogieIcfgContainer [2022-12-13 13:08:31,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:08:31,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:08:31,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:08:31,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:08:31,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:07:42" (1/3) ... [2022-12-13 13:08:31,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231d73b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:08:31, skipping insertion in model container [2022-12-13 13:08:31,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:07:43" (2/3) ... [2022-12-13 13:08:31,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231d73b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:08:31, skipping insertion in model container [2022-12-13 13:08:31,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:08:31" (3/3) ... [2022-12-13 13:08:31,213 INFO L112 eAbstractionObserver]: Analyzing ICFG diskperf.i.cil-1.c [2022-12-13 13:08:31,225 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:08:31,225 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 13:08:31,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:08:31,271 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;@1be3f85a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:08:31,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 13:08:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2022-12-13 13:08:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 13:08:31,280 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:31,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:31,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:31,285 INFO L85 PathProgramCache]: Analyzing trace with hash 2013573229, now seen corresponding path program 1 times [2022-12-13 13:08:31,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:31,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328666424] [2022-12-13 13:08:31,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:31,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:32,419 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 13:08:32,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328666424] [2022-12-13 13:08:32,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328666424] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:32,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:32,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:08:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414883332] [2022-12-13 13:08:32,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:32,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 13:08:32,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 13:08:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:08:32,449 INFO L87 Difference]: Start difference. First operand has 378 states, 274 states have (on average 1.4197080291970803) internal successors, (389), 292 states have internal predecessors, (389), 80 states have call successors, (80), 22 states have call predecessors, (80), 22 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 13:08:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:32,501 INFO L93 Difference]: Finished difference Result 750 states and 1130 transitions. [2022-12-13 13:08:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 13:08:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 17 [2022-12-13 13:08:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:32,510 INFO L225 Difference]: With dead ends: 750 [2022-12-13 13:08:32,511 INFO L226 Difference]: Without dead ends: 371 [2022-12-13 13:08:32,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 13:08:32,517 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:32,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:08:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-12-13 13:08:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-12-13 13:08:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 269 states have (on average 1.3605947955390334) internal successors, (366), 285 states have internal predecessors, (366), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-13 13:08:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 512 transitions. [2022-12-13 13:08:32,564 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 512 transitions. Word has length 17 [2022-12-13 13:08:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:32,564 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 512 transitions. [2022-12-13 13:08:32,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 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 13:08:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 512 transitions. [2022-12-13 13:08:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 13:08:32,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:32,565 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 13:08:32,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 13:08:32,565 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -6791183, now seen corresponding path program 1 times [2022-12-13 13:08:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:32,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120309283] [2022-12-13 13:08:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:32,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:33,870 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 13:08:33,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:33,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120309283] [2022-12-13 13:08:33,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120309283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:33,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:33,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:08:33,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593799683] [2022-12-13 13:08:33,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:08:33,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:08:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:08:33,874 INFO L87 Difference]: Start difference. First operand 371 states and 512 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 13:08:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:33,997 INFO L93 Difference]: Finished difference Result 744 states and 1027 transitions. [2022-12-13 13:08:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:08:33,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 13:08:33,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:34,000 INFO L225 Difference]: With dead ends: 744 [2022-12-13 13:08:34,000 INFO L226 Difference]: Without dead ends: 377 [2022-12-13 13:08:34,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:08:34,003 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 2 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:34,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1516 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:08:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-12-13 13:08:34,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 375. [2022-12-13 13:08:34,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3553113553113554) internal successors, (370), 289 states have internal predecessors, (370), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-13 13:08:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 516 transitions. [2022-12-13 13:08:34,031 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 516 transitions. Word has length 19 [2022-12-13 13:08:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:34,032 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 516 transitions. [2022-12-13 13:08:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 13:08:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 516 transitions. [2022-12-13 13:08:34,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 13:08:34,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:34,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:34,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 13:08:34,033 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:34,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:34,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1840508881, now seen corresponding path program 1 times [2022-12-13 13:08:34,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:34,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884334035] [2022-12-13 13:08:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:34,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:35,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884334035] [2022-12-13 13:08:35,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884334035] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:35,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:35,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:08:35,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613147100] [2022-12-13 13:08:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:35,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:35,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:35,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:35,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:35,887 INFO L87 Difference]: Start difference. First operand 375 states and 516 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 13:08:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:36,052 INFO L93 Difference]: Finished difference Result 395 states and 542 transitions. [2022-12-13 13:08:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:36,052 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 23 [2022-12-13 13:08:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:36,055 INFO L225 Difference]: With dead ends: 395 [2022-12-13 13:08:36,055 INFO L226 Difference]: Without dead ends: 375 [2022-12-13 13:08:36,056 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 13:08:36,057 INFO L413 NwaCegarLoop]: 510 mSDtfsCounter, 12 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:36,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 965 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:08:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-13 13:08:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-12-13 13:08:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 273 states have (on average 1.3516483516483517) internal successors, (369), 289 states have internal predecessors, (369), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-13 13:08:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 515 transitions. [2022-12-13 13:08:36,085 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 515 transitions. Word has length 23 [2022-12-13 13:08:36,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:36,086 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 515 transitions. [2022-12-13 13:08:36,086 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 13:08:36,086 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 515 transitions. [2022-12-13 13:08:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 13:08:36,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:36,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:08:36,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 13:08:36,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:36,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:36,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2125296181, now seen corresponding path program 1 times [2022-12-13 13:08:36,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:36,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270701753] [2022-12-13 13:08:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:36,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:38,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:38,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270701753] [2022-12-13 13:08:38,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270701753] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:38,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:38,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:08:38,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069966185] [2022-12-13 13:08:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:38,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:38,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:38,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:38,020 INFO L87 Difference]: Start difference. First operand 375 states and 515 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 13:08:40,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:08:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:40,374 INFO L93 Difference]: Finished difference Result 869 states and 1216 transitions. [2022-12-13 13:08:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2022-12-13 13:08:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:40,380 INFO L225 Difference]: With dead ends: 869 [2022-12-13 13:08:40,380 INFO L226 Difference]: Without dead ends: 614 [2022-12-13 13:08:40,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 13:08:40,383 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 431 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:40,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1066 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-12-13 13:08:40,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-12-13 13:08:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 594. [2022-12-13 13:08:40,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 435 states have (on average 1.335632183908046) internal successors, (581), 445 states have internal predecessors, (581), 120 states have call successors, (120), 39 states have call predecessors, (120), 38 states have return successors, (129), 113 states have call predecessors, (129), 109 states have call successors, (129) [2022-12-13 13:08:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2022-12-13 13:08:40,428 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 25 [2022-12-13 13:08:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:40,428 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2022-12-13 13:08:40,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 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 13:08:40,429 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2022-12-13 13:08:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 13:08:40,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:40,431 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:08:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 13:08:40,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -642930051, now seen corresponding path program 1 times [2022-12-13 13:08:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:40,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002937868] [2022-12-13 13:08:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:42,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002937868] [2022-12-13 13:08:42,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002937868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:42,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:42,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:08:42,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120606237] [2022-12-13 13:08:42,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:42,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:42,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:42,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:42,538 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 13:08:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:42,664 INFO L93 Difference]: Finished difference Result 1408 states and 2008 transitions. [2022-12-13 13:08:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 33 [2022-12-13 13:08:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:42,669 INFO L225 Difference]: With dead ends: 1408 [2022-12-13 13:08:42,669 INFO L226 Difference]: Without dead ends: 945 [2022-12-13 13:08:42,671 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 13:08:42,672 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 421 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:42,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 919 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:08:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-12-13 13:08:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 915. [2022-12-13 13:08:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 663 states have (on average 1.3423831070889893) internal successors, (890), 674 states have internal predecessors, (890), 189 states have call successors, (189), 62 states have call predecessors, (189), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2022-12-13 13:08:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1302 transitions. [2022-12-13 13:08:42,718 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1302 transitions. Word has length 33 [2022-12-13 13:08:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:42,718 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1302 transitions. [2022-12-13 13:08:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 13:08:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1302 transitions. [2022-12-13 13:08:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 13:08:42,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:42,720 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:08:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 13:08:42,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 401969732, now seen corresponding path program 1 times [2022-12-13 13:08:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:42,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936585516] [2022-12-13 13:08:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:44,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:44,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:44,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936585516] [2022-12-13 13:08:44,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936585516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:44,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:44,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:08:44,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286759132] [2022-12-13 13:08:44,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:44,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:08:44,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:08:44,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:08:44,130 INFO L87 Difference]: Start difference. First operand 915 states and 1302 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 13:08:46,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:08:46,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:46,356 INFO L93 Difference]: Finished difference Result 929 states and 1321 transitions. [2022-12-13 13:08:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:08:46,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-12-13 13:08:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:46,363 INFO L225 Difference]: With dead ends: 929 [2022-12-13 13:08:46,364 INFO L226 Difference]: Without dead ends: 925 [2022-12-13 13:08:46,364 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 13:08:46,365 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 28 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:46,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 13:08:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-12-13 13:08:46,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2022-12-13 13:08:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 673 states have (on average 1.3417533432392272) internal successors, (903), 682 states have internal predecessors, (903), 188 states have call successors, (188), 63 states have call predecessors, (188), 62 states have return successors, (223), 183 states have call predecessors, (223), 179 states have call successors, (223) [2022-12-13 13:08:46,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1314 transitions. [2022-12-13 13:08:46,389 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1314 transitions. Word has length 33 [2022-12-13 13:08:46,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:46,389 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1314 transitions. [2022-12-13 13:08:46,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 13:08:46,390 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1314 transitions. [2022-12-13 13:08:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 13:08:46,390 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:46,390 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:08:46,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 13:08:46,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:46,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:46,391 INFO L85 PathProgramCache]: Analyzing trace with hash 937185154, now seen corresponding path program 1 times [2022-12-13 13:08:46,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:46,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318448164] [2022-12-13 13:08:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:46,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:48,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 13:08:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:48,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:48,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318448164] [2022-12-13 13:08:48,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318448164] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:48,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:48,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:08:48,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474960920] [2022-12-13 13:08:48,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:08:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:08:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:08:48,582 INFO L87 Difference]: Start difference. First operand 924 states and 1314 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:08:50,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:08:52,742 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 13:08:55,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:08:55,082 INFO L93 Difference]: Finished difference Result 981 states and 1395 transitions. [2022-12-13 13:08:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:08:55,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-12-13 13:08:55,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:08:55,089 INFO L225 Difference]: With dead ends: 981 [2022-12-13 13:08:55,089 INFO L226 Difference]: Without dead ends: 970 [2022-12-13 13:08:55,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:08:55,090 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 653 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 133 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:08:55,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 980 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 769 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-12-13 13:08:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-12-13 13:08:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 948. [2022-12-13 13:08:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.3410071942446042) internal successors, (932), 706 states have internal predecessors, (932), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2022-12-13 13:08:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1352 transitions. [2022-12-13 13:08:55,122 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1352 transitions. Word has length 37 [2022-12-13 13:08:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:08:55,122 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1352 transitions. [2022-12-13 13:08:55,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:08:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1352 transitions. [2022-12-13 13:08:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 13:08:55,123 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:08:55,123 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:08:55,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 13:08:55,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:08:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:08:55,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1448171803, now seen corresponding path program 1 times [2022-12-13 13:08:55,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:08:55,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120497046] [2022-12-13 13:08:55,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:08:55,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:08:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:57,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 13:08:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:08:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:08:57,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:08:57,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120497046] [2022-12-13 13:08:57,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120497046] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:08:57,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:08:57,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:08:57,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624189172] [2022-12-13 13:08:57,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:08:57,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:08:57,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:08:57,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:08:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:08:57,186 INFO L87 Difference]: Start difference. First operand 948 states and 1352 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:08:59,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:01,353 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 13:09:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:09:03,689 INFO L93 Difference]: Finished difference Result 972 states and 1380 transitions. [2022-12-13 13:09:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:09:03,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-12-13 13:09:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:09:03,695 INFO L225 Difference]: With dead ends: 972 [2022-12-13 13:09:03,695 INFO L226 Difference]: Without dead ends: 964 [2022-12-13 13:09:03,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:09:03,696 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 642 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:09:03,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 974 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 765 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-12-13 13:09:03,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-12-13 13:09:03,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 948. [2022-12-13 13:09:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 695 states have (on average 1.339568345323741) internal successors, (931), 706 states have internal predecessors, (931), 188 states have call successors, (188), 63 states have call predecessors, (188), 64 states have return successors, (232), 183 states have call predecessors, (232), 179 states have call successors, (232) [2022-12-13 13:09:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1351 transitions. [2022-12-13 13:09:03,734 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1351 transitions. Word has length 38 [2022-12-13 13:09:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:09:03,735 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1351 transitions. [2022-12-13 13:09:03,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1351 transitions. [2022-12-13 13:09:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 13:09:03,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:09:03,736 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:09:03,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 13:09:03,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:09:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 2084178201, now seen corresponding path program 1 times [2022-12-13 13:09:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:03,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294136079] [2022-12-13 13:09:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:03,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:05,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 13:09:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:05,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:05,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294136079] [2022-12-13 13:09:05,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294136079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:05,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:05,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:09:05,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617475031] [2022-12-13 13:09:05,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:05,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:09:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:05,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:09:05,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:09:05,298 INFO L87 Difference]: Start difference. First operand 948 states and 1351 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:07,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:09:08,929 INFO L93 Difference]: Finished difference Result 1745 states and 2521 transitions. [2022-12-13 13:09:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:09:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-12-13 13:09:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:09:08,935 INFO L225 Difference]: With dead ends: 1745 [2022-12-13 13:09:08,936 INFO L226 Difference]: Without dead ends: 1716 [2022-12-13 13:09:08,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 13:09:08,937 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 686 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 125 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:09:08,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 990 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 401 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2022-12-13 13:09:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-12-13 13:09:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1677. [2022-12-13 13:09:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1218 states have (on average 1.348111658456486) internal successors, (1642), 1233 states have internal predecessors, (1642), 338 states have call successors, (338), 119 states have call predecessors, (338), 120 states have return successors, (446), 334 states have call predecessors, (446), 329 states have call successors, (446) [2022-12-13 13:09:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2426 transitions. [2022-12-13 13:09:08,998 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2426 transitions. Word has length 39 [2022-12-13 13:09:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:09:08,998 INFO L495 AbstractCegarLoop]: Abstraction has 1677 states and 2426 transitions. [2022-12-13 13:09:08,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2426 transitions. [2022-12-13 13:09:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 13:09:08,999 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:09:08,999 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:09:08,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 13:09:08,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:09:09,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash 193456973, now seen corresponding path program 1 times [2022-12-13 13:09:09,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:09,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707218176] [2022-12-13 13:09:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:09,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:11,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-12-13 13:09:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:11,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:11,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707218176] [2022-12-13 13:09:11,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707218176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:11,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:11,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 13:09:11,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787427016] [2022-12-13 13:09:11,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:09:11,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:11,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:09:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:09:11,040 INFO L87 Difference]: Start difference. First operand 1677 states and 2426 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:13,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:15,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:18,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-13 13:09:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:09:19,696 INFO L93 Difference]: Finished difference Result 1710 states and 2471 transitions. [2022-12-13 13:09:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:09:19,697 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-12-13 13:09:19,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:09:19,707 INFO L225 Difference]: With dead ends: 1710 [2022-12-13 13:09:19,707 INFO L226 Difference]: Without dead ends: 1692 [2022-12-13 13:09:19,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 13:09:19,708 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 158 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 65 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:09:19,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1235 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 540 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2022-12-13 13:09:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-12-13 13:09:19,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1673. [2022-12-13 13:09:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1215 states have (on average 1.348148148148148) internal successors, (1638), 1230 states have internal predecessors, (1638), 337 states have call successors, (337), 119 states have call predecessors, (337), 120 states have return successors, (445), 333 states have call predecessors, (445), 328 states have call successors, (445) [2022-12-13 13:09:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2420 transitions. [2022-12-13 13:09:19,813 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2420 transitions. Word has length 40 [2022-12-13 13:09:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:09:19,813 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 2420 transitions. [2022-12-13 13:09:19,813 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), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2420 transitions. [2022-12-13 13:09:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 13:09:19,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:09:19,814 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:09:19,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 13:09:19,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:09:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1037165454, now seen corresponding path program 1 times [2022-12-13 13:09:19,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:19,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160195396] [2022-12-13 13:09:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:19,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 13:09:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:21,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160195396] [2022-12-13 13:09:21,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160195396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:21,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:21,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:09:21,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121093264] [2022-12-13 13:09:21,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:21,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:09:21,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:21,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:09:21,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:09:21,576 INFO L87 Difference]: Start difference. First operand 1673 states and 2420 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:23,659 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 13:09:25,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:27,770 WARN L539 Checker$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 13:09:30,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:09:30,558 INFO L93 Difference]: Finished difference Result 2633 states and 4035 transitions. [2022-12-13 13:09:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:09:30,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-12-13 13:09:30,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:09:30,569 INFO L225 Difference]: With dead ends: 2633 [2022-12-13 13:09:30,569 INFO L226 Difference]: Without dead ends: 2625 [2022-12-13 13:09:30,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:09:30,570 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 437 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 126 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:09:30,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 1027 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 689 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2022-12-13 13:09:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2022-12-13 13:09:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1815. [2022-12-13 13:09:30,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1317 states have (on average 1.3500379650721337) internal successors, (1778), 1336 states have internal predecessors, (1778), 365 states have call successors, (365), 128 states have call predecessors, (365), 132 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2022-12-13 13:09:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 2637 transitions. [2022-12-13 13:09:30,671 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 2637 transitions. Word has length 43 [2022-12-13 13:09:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:09:30,671 INFO L495 AbstractCegarLoop]: Abstraction has 1815 states and 2637 transitions. [2022-12-13 13:09:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 2637 transitions. [2022-12-13 13:09:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:09:30,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:09:30,672 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:09:30,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 13:09:30,672 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:09:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:30,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1937989103, now seen corresponding path program 1 times [2022-12-13 13:09:30,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:30,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131895584] [2022-12-13 13:09:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:30,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:33,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 13:09:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:33,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:33,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131895584] [2022-12-13 13:09:33,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131895584] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:33,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:33,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:09:33,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717097656] [2022-12-13 13:09:33,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:33,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:09:33,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:33,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:09:33,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:09:33,100 INFO L87 Difference]: Start difference. First operand 1815 states and 2637 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:35,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:37,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:09:39,812 INFO L93 Difference]: Finished difference Result 1864 states and 2700 transitions. [2022-12-13 13:09:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:09:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-12-13 13:09:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:09:39,819 INFO L225 Difference]: With dead ends: 1864 [2022-12-13 13:09:39,819 INFO L226 Difference]: Without dead ends: 1832 [2022-12-13 13:09:39,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:09:39,821 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 171 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 66 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:09:39,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 1552 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 728 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-12-13 13:09:39,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-12-13 13:09:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1813. [2022-12-13 13:09:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1316 states have (on average 1.3487841945288754) internal successors, (1775), 1335 states have internal predecessors, (1775), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2022-12-13 13:09:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2632 transitions. [2022-12-13 13:09:39,906 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2632 transitions. Word has length 44 [2022-12-13 13:09:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:09:39,906 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2632 transitions. [2022-12-13 13:09:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2632 transitions. [2022-12-13 13:09:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:09:39,907 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:09:39,907 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:09:39,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 13:09:39,908 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:09:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1633946811, now seen corresponding path program 1 times [2022-12-13 13:09:39,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:39,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114532623] [2022-12-13 13:09:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:39,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:41,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 13:09:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:42,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:42,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:42,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114532623] [2022-12-13 13:09:42,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114532623] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:42,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:42,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:09:42,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040635286] [2022-12-13 13:09:42,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:09:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:09:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:09:42,012 INFO L87 Difference]: Start difference. First operand 1813 states and 2632 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:44,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:46,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:48,248 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 13:09:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:09:52,538 INFO L93 Difference]: Finished difference Result 2635 states and 4032 transitions. [2022-12-13 13:09:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:09:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-12-13 13:09:52,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:09:52,549 INFO L225 Difference]: With dead ends: 2635 [2022-12-13 13:09:52,549 INFO L226 Difference]: Without dead ends: 2627 [2022-12-13 13:09:52,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:09:52,551 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 1224 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 425 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 425 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:09:52,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 1133 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [425 Valid, 1067 Invalid, 3 Unknown, 0 Unchecked, 10.0s Time] [2022-12-13 13:09:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2022-12-13 13:09:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 1813. [2022-12-13 13:09:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1316 states have (on average 1.3480243161094225) internal successors, (1774), 1335 states have internal predecessors, (1774), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2022-12-13 13:09:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2631 transitions. [2022-12-13 13:09:52,707 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2631 transitions. Word has length 44 [2022-12-13 13:09:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:09:52,707 INFO L495 AbstractCegarLoop]: Abstraction has 1813 states and 2631 transitions. [2022-12-13 13:09:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2631 transitions. [2022-12-13 13:09:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:09:52,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:09:52,708 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:09:52,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 13:09:52,708 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:09:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:09:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash -9767716, now seen corresponding path program 1 times [2022-12-13 13:09:52,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:09:52,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774046195] [2022-12-13 13:09:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:09:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:09:53,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:55,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 13:09:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:09:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:09:55,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:09:55,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774046195] [2022-12-13 13:09:55,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774046195] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:09:55,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:09:55,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 13:09:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291468105] [2022-12-13 13:09:55,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:09:55,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:09:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:09:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:09:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:09:55,414 INFO L87 Difference]: Start difference. First operand 1813 states and 2631 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:09:57,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:09:59,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:01,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:03,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:05,799 WARN L539 Checker$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 13:10:07,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:09,859 WARN L539 Checker$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 13:10:11,869 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 13:10:16,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:16,181 INFO L93 Difference]: Finished difference Result 1982 states and 2970 transitions. [2022-12-13 13:10:16,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:10:16,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-12-13 13:10:16,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:16,189 INFO L225 Difference]: With dead ends: 1982 [2022-12-13 13:10:16,189 INFO L226 Difference]: Without dead ends: 1978 [2022-12-13 13:10:16,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:10:16,190 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 91 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 75 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:16,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 2351 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1099 Invalid, 8 Unknown, 0 Unchecked, 20.5s Time] [2022-12-13 13:10:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2022-12-13 13:10:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1820. [2022-12-13 13:10:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1323 states have (on average 1.346938775510204) internal successors, (1782), 1342 states have internal predecessors, (1782), 364 states have call successors, (364), 128 states have call predecessors, (364), 132 states have return successors, (493), 359 states have call predecessors, (493), 355 states have call successors, (493) [2022-12-13 13:10:16,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2639 transitions. [2022-12-13 13:10:16,311 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2639 transitions. Word has length 45 [2022-12-13 13:10:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:16,312 INFO L495 AbstractCegarLoop]: Abstraction has 1820 states and 2639 transitions. [2022-12-13 13:10:16,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:10:16,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2639 transitions. [2022-12-13 13:10:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:10:16,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:16,313 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 13:10:16,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -10044546, now seen corresponding path program 1 times [2022-12-13 13:10:16,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:16,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993091362] [2022-12-13 13:10:16,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:16,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:18,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 13:10:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:18,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:18,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993091362] [2022-12-13 13:10:18,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993091362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:18,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:18,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:10:18,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986609834] [2022-12-13 13:10:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:18,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:10:18,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:10:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:10:18,451 INFO L87 Difference]: Start difference. First operand 1820 states and 2639 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:10:20,568 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 13:10:22,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:24,710 WARN L539 Checker$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 13:10:29,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:29,325 INFO L93 Difference]: Finished difference Result 2636 states and 4032 transitions. [2022-12-13 13:10:29,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:10:29,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-12-13 13:10:29,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:29,336 INFO L225 Difference]: With dead ends: 2636 [2022-12-13 13:10:29,336 INFO L226 Difference]: Without dead ends: 2620 [2022-12-13 13:10:29,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:10:29,337 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1208 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 424 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:29,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 1130 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 1064 Invalid, 3 Unknown, 0 Unchecked, 10.3s Time] [2022-12-13 13:10:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2022-12-13 13:10:29,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 1812. [2022-12-13 13:10:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1316 states have (on average 1.3472644376899696) internal successors, (1773), 1335 states have internal predecessors, (1773), 363 states have call successors, (363), 128 states have call predecessors, (363), 132 states have return successors, (492), 358 states have call predecessors, (492), 354 states have call successors, (492) [2022-12-13 13:10:29,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 2628 transitions. [2022-12-13 13:10:29,472 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 2628 transitions. Word has length 45 [2022-12-13 13:10:29,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:29,472 INFO L495 AbstractCegarLoop]: Abstraction has 1812 states and 2628 transitions. [2022-12-13 13:10:29,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:10:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 2628 transitions. [2022-12-13 13:10:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:10:29,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:29,473 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:29,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 13:10:29,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:29,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:29,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1045402083, now seen corresponding path program 1 times [2022-12-13 13:10:29,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:29,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929467557] [2022-12-13 13:10:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:29,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:31,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929467557] [2022-12-13 13:10:31,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929467557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:31,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:31,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:10:31,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251210787] [2022-12-13 13:10:31,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:31,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:10:31,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:10:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:10:31,636 INFO L87 Difference]: Start difference. First operand 1812 states and 2628 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:10:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:32,412 INFO L93 Difference]: Finished difference Result 1839 states and 2653 transitions. [2022-12-13 13:10:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:10:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 44 [2022-12-13 13:10:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:32,419 INFO L225 Difference]: With dead ends: 1839 [2022-12-13 13:10:32,419 INFO L226 Difference]: Without dead ends: 1815 [2022-12-13 13:10:32,419 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 13:10:32,420 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 482 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:32,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 752 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:10:32,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2022-12-13 13:10:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1804. [2022-12-13 13:10:32,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1309 states have (on average 1.3475935828877006) internal successors, (1764), 1329 states have internal predecessors, (1764), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (490), 356 states have call predecessors, (490), 354 states have call successors, (490) [2022-12-13 13:10:32,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 2617 transitions. [2022-12-13 13:10:32,523 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 2617 transitions. Word has length 44 [2022-12-13 13:10:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:32,523 INFO L495 AbstractCegarLoop]: Abstraction has 1804 states and 2617 transitions. [2022-12-13 13:10:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:10:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 2617 transitions. [2022-12-13 13:10:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:10:32,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:32,524 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:32,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 13:10:32,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:32,524 INFO L85 PathProgramCache]: Analyzing trace with hash 470915374, now seen corresponding path program 1 times [2022-12-13 13:10:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:32,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478054548] [2022-12-13 13:10:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:32,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:34,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:34,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478054548] [2022-12-13 13:10:34,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478054548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:34,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:34,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:10:34,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940661680] [2022-12-13 13:10:34,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:34,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:10:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:10:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:10:34,502 INFO L87 Difference]: Start difference. First operand 1804 states and 2617 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:10:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:35,259 INFO L93 Difference]: Finished difference Result 1842 states and 2658 transitions. [2022-12-13 13:10:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:10:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 44 [2022-12-13 13:10:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:35,264 INFO L225 Difference]: With dead ends: 1842 [2022-12-13 13:10:35,264 INFO L226 Difference]: Without dead ends: 1805 [2022-12-13 13:10:35,265 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 13:10:35,265 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 467 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:35,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 761 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 13:10:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-12-13 13:10:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1803. [2022-12-13 13:10:35,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1308 states have (on average 1.345565749235474) internal successors, (1760), 1328 states have internal predecessors, (1760), 363 states have call successors, (363), 128 states have call predecessors, (363), 131 states have return successors, (489), 356 states have call predecessors, (489), 354 states have call successors, (489) [2022-12-13 13:10:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2612 transitions. [2022-12-13 13:10:35,381 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2612 transitions. Word has length 44 [2022-12-13 13:10:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:35,382 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2612 transitions. [2022-12-13 13:10:35,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 13:10:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2612 transitions. [2022-12-13 13:10:35,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 13:10:35,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:35,383 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:35,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 13:10:35,383 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:35,383 INFO L85 PathProgramCache]: Analyzing trace with hash -103073746, now seen corresponding path program 1 times [2022-12-13 13:10:35,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:35,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458298698] [2022-12-13 13:10:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:35,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:36,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:36,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458298698] [2022-12-13 13:10:36,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458298698] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:36,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:36,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:10:36,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84253985] [2022-12-13 13:10:36,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:36,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:10:36,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:36,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:10:36,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:10:36,787 INFO L87 Difference]: Start difference. First operand 1803 states and 2612 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 13:10:38,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:39,282 INFO L93 Difference]: Finished difference Result 2542 states and 3790 transitions. [2022-12-13 13:10:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:10:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 44 [2022-12-13 13:10:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:39,291 INFO L225 Difference]: With dead ends: 2542 [2022-12-13 13:10:39,291 INFO L226 Difference]: Without dead ends: 2529 [2022-12-13 13:10:39,292 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 13:10:39,292 INFO L413 NwaCegarLoop]: 759 mSDtfsCounter, 321 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:39,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1170 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 13:10:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2022-12-13 13:10:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 1803. [2022-12-13 13:10:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1308 states have (on average 1.3432721712538227) internal successors, (1757), 1328 states have internal predecessors, (1757), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2022-12-13 13:10:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2616 transitions. [2022-12-13 13:10:39,437 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2616 transitions. Word has length 44 [2022-12-13 13:10:39,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:39,437 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 2616 transitions. [2022-12-13 13:10:39,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 13:10:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2616 transitions. [2022-12-13 13:10:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:10:39,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:39,437 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:39,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 13:10:39,438 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:39,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1553092361, now seen corresponding path program 1 times [2022-12-13 13:10:39,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339354486] [2022-12-13 13:10:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:39,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:41,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339354486] [2022-12-13 13:10:41,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339354486] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:41,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:41,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:10:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193754396] [2022-12-13 13:10:41,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:10:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:10:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:10:41,481 INFO L87 Difference]: Start difference. First operand 1803 states and 2616 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 13:10:43,615 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 13:10:45,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:47,666 WARN L539 Checker$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 13:10:49,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:51,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:10:52,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:52,067 INFO L93 Difference]: Finished difference Result 1817 states and 2631 transitions. [2022-12-13 13:10:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:10:52,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 45 [2022-12-13 13:10:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:52,073 INFO L225 Difference]: With dead ends: 1817 [2022-12-13 13:10:52,073 INFO L226 Difference]: Without dead ends: 1813 [2022-12-13 13:10:52,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:10:52,074 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 42 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:52,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2249 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 5 Unknown, 0 Unchecked, 10.4s Time] [2022-12-13 13:10:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2022-12-13 13:10:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1809. [2022-12-13 13:10:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1314 states have (on average 1.3424657534246576) internal successors, (1764), 1334 states have internal predecessors, (1764), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2022-12-13 13:10:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 2623 transitions. [2022-12-13 13:10:52,185 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 2623 transitions. Word has length 45 [2022-12-13 13:10:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:52,185 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 2623 transitions. [2022-12-13 13:10:52,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 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 13:10:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 2623 transitions. [2022-12-13 13:10:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 13:10:52,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:52,186 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:52,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 13:10:52,186 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:52,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:52,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1552815531, now seen corresponding path program 1 times [2022-12-13 13:10:52,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:52,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507880128] [2022-12-13 13:10:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:54,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:54,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507880128] [2022-12-13 13:10:54,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507880128] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:54,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:54,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:10:54,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143388347] [2022-12-13 13:10:54,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:54,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:10:54,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:10:54,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:10:54,201 INFO L87 Difference]: Start difference. First operand 1809 states and 2623 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 13:10:55,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:10:55,327 INFO L93 Difference]: Finished difference Result 2537 states and 3783 transitions. [2022-12-13 13:10:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:10:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 45 [2022-12-13 13:10:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:10:55,334 INFO L225 Difference]: With dead ends: 2537 [2022-12-13 13:10:55,334 INFO L226 Difference]: Without dead ends: 2510 [2022-12-13 13:10:55,335 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 13:10:55,336 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 665 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:10:55,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 1046 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 13:10:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2022-12-13 13:10:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 1786. [2022-12-13 13:10:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1291 states have (on average 1.3446940356312935) internal successors, (1736), 1311 states have internal predecessors, (1736), 362 states have call successors, (362), 128 states have call predecessors, (362), 132 states have return successors, (497), 356 states have call predecessors, (497), 354 states have call successors, (497) [2022-12-13 13:10:55,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2595 transitions. [2022-12-13 13:10:55,456 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2595 transitions. Word has length 45 [2022-12-13 13:10:55,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:10:55,456 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2595 transitions. [2022-12-13 13:10:55,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 13:10:55,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2595 transitions. [2022-12-13 13:10:55,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 13:10:55,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:10:55,457 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 13:10:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 13:10:55,457 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:10:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:10:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash -974225584, now seen corresponding path program 1 times [2022-12-13 13:10:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:10:55,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600327273] [2022-12-13 13:10:55,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:10:55,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:10:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:57,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 13:10:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:10:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:10:57,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:10:57,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600327273] [2022-12-13 13:10:57,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600327273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:10:57,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:10:57,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 13:10:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862524085] [2022-12-13 13:10:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:10:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:10:57,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:10:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:10:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:10:57,779 INFO L87 Difference]: Start difference. First operand 1786 states and 2595 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:10:59,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:01,977 WARN L539 Checker$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 13:11:04,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:06,070 WARN L539 Checker$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 13:11:08,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:10,087 WARN L539 Checker$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 13:11:12,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:14,154 WARN L539 Checker$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 13:11:18,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:11:18,269 INFO L93 Difference]: Finished difference Result 1946 states and 2923 transitions. [2022-12-13 13:11:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:11:18,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-12-13 13:11:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:11:18,274 INFO L225 Difference]: With dead ends: 1946 [2022-12-13 13:11:18,274 INFO L226 Difference]: Without dead ends: 1927 [2022-12-13 13:11:18,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:11:18,276 INFO L413 NwaCegarLoop]: 388 mSDtfsCounter, 87 mSDsluCounter, 1765 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 71 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:11:18,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 2153 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1051 Invalid, 8 Unknown, 0 Unchecked, 20.2s Time] [2022-12-13 13:11:18,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2022-12-13 13:11:18,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1773. [2022-12-13 13:11:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1279 states have (on average 1.346364347146208) internal successors, (1722), 1299 states have internal predecessors, (1722), 361 states have call successors, (361), 128 states have call predecessors, (361), 132 states have return successors, (496), 355 states have call predecessors, (496), 353 states have call successors, (496) [2022-12-13 13:11:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2579 transitions. [2022-12-13 13:11:18,412 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2579 transitions. Word has length 47 [2022-12-13 13:11:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:11:18,412 INFO L495 AbstractCegarLoop]: Abstraction has 1773 states and 2579 transitions. [2022-12-13 13:11:18,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 6 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 13:11:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2579 transitions. [2022-12-13 13:11:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 13:11:18,413 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:11:18,413 INFO L195 NwaCegarLoop]: trace histogram [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 13:11:18,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 13:11:18,413 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:11:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:11:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash 571500937, now seen corresponding path program 1 times [2022-12-13 13:11:18,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:11:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464612851] [2022-12-13 13:11:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:11:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:11:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:20,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 13:11:20,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:21,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:11:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:11:21,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:11:21,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464612851] [2022-12-13 13:11:21,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464612851] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:11:21,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:11:21,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 13:11:21,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665075605] [2022-12-13 13:11:21,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:11:21,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:11:21,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:11:21,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:11:21,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:11:21,130 INFO L87 Difference]: Start difference. First operand 1773 states and 2579 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 13:11:23,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:25,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:27,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:29,488 WARN L539 Checker$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 13:11:31,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:33,503 WARN L539 Checker$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 13:11:35,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:37,527 WARN L539 Checker$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 13:11:39,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:41,545 WARN L539 Checker$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 13:11:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:11:46,977 INFO L93 Difference]: Finished difference Result 1929 states and 2903 transitions. [2022-12-13 13:11:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 13:11:46,978 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 55 [2022-12-13 13:11:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:11:46,984 INFO L225 Difference]: With dead ends: 1929 [2022-12-13 13:11:46,984 INFO L226 Difference]: Without dead ends: 1897 [2022-12-13 13:11:46,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:11:46,985 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 86 mSDsluCounter, 2332 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 68 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 2707 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:11:46,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 2707 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1344 Invalid, 10 Unknown, 0 Unchecked, 25.5s Time] [2022-12-13 13:11:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-12-13 13:11:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1740. [2022-12-13 13:11:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1251 states have (on average 1.3509192645883292) internal successors, (1690), 1270 states have internal predecessors, (1690), 358 states have call successors, (358), 126 states have call predecessors, (358), 130 states have return successors, (486), 353 states have call predecessors, (486), 351 states have call successors, (486) [2022-12-13 13:11:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2534 transitions. [2022-12-13 13:11:47,106 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2534 transitions. Word has length 55 [2022-12-13 13:11:47,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:11:47,106 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 2534 transitions. [2022-12-13 13:11:47,106 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 13:11:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2534 transitions. [2022-12-13 13:11:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 13:11:47,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:11:47,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:11:47,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 13:11:47,107 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:11:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:11:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -594664819, now seen corresponding path program 1 times [2022-12-13 13:11:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:11:47,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677244299] [2022-12-13 13:11:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:11:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:11:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:48,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 13:11:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:48,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 13:11:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 13:11:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:11:48,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:11:48,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677244299] [2022-12-13 13:11:48,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677244299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:11:48,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:11:48,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:11:48,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712461344] [2022-12-13 13:11:48,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:11:48,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:11:48,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:11:48,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:11:48,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:11:48,962 INFO L87 Difference]: Start difference. First operand 1740 states and 2534 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:11:51,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:53,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:55,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:11:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:11:57,984 INFO L93 Difference]: Finished difference Result 1992 states and 2963 transitions. [2022-12-13 13:11:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 13:11:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2022-12-13 13:11:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:11:57,989 INFO L225 Difference]: With dead ends: 1992 [2022-12-13 13:11:57,989 INFO L226 Difference]: Without dead ends: 1190 [2022-12-13 13:11:57,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:11:57,992 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 707 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 157 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:11:57,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 800 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 626 Invalid, 3 Unknown, 0 Unchecked, 8.7s Time] [2022-12-13 13:11:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-12-13 13:11:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1036. [2022-12-13 13:11:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 758 states have (on average 1.3324538258575198) internal successors, (1010), 772 states have internal predecessors, (1010), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2022-12-13 13:11:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1474 transitions. [2022-12-13 13:11:58,069 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1474 transitions. Word has length 59 [2022-12-13 13:11:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:11:58,070 INFO L495 AbstractCegarLoop]: Abstraction has 1036 states and 1474 transitions. [2022-12-13 13:11:58,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 13:11:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1474 transitions. [2022-12-13 13:11:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 13:11:58,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:11:58,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:11:58,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 13:11:58,070 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:11:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:11:58,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1400087629, now seen corresponding path program 1 times [2022-12-13 13:11:58,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:11:58,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515259858] [2022-12-13 13:11:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:11:58,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:11:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:59,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 13:11:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:59,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 13:11:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-12-13 13:11:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:59,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 13:11:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:11:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:11:59,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:11:59,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515259858] [2022-12-13 13:11:59,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515259858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:11:59,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:11:59,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:11:59,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385306372] [2022-12-13 13:11:59,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:11:59,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:11:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:11:59,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:11:59,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:11:59,658 INFO L87 Difference]: Start difference. First operand 1036 states and 1474 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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 13:12:01,775 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 13:12:03,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:12:05,966 WARN L539 Checker$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 13:12:07,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:12:09,979 WARN L539 Checker$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 13:12:13,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:12:13,276 INFO L93 Difference]: Finished difference Result 2200 states and 3289 transitions. [2022-12-13 13:12:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:12:13,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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 63 [2022-12-13 13:12:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:12:13,281 INFO L225 Difference]: With dead ends: 2200 [2022-12-13 13:12:13,281 INFO L226 Difference]: Without dead ends: 1279 [2022-12-13 13:12:13,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:12:13,284 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 525 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 232 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:12:13,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 1051 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 791 Invalid, 5 Unknown, 0 Unchecked, 13.1s Time] [2022-12-13 13:12:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-12-13 13:12:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1057. [2022-12-13 13:12:13,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 779 states have (on average 1.3350449293966624) internal successors, (1040), 790 states have internal predecessors, (1040), 195 states have call successors, (195), 78 states have call predecessors, (195), 82 states have return successors, (269), 192 states have call predecessors, (269), 188 states have call successors, (269) [2022-12-13 13:12:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1504 transitions. [2022-12-13 13:12:13,369 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1504 transitions. Word has length 63 [2022-12-13 13:12:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:12:13,369 INFO L495 AbstractCegarLoop]: Abstraction has 1057 states and 1504 transitions. [2022-12-13 13:12:13,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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 13:12:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1504 transitions. [2022-12-13 13:12:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 13:12:13,369 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:12:13,370 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:12:13,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 13:12:13,370 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:12:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:12:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2082721172, now seen corresponding path program 1 times [2022-12-13 13:12:13,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:12:13,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813240784] [2022-12-13 13:12:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:12:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:12:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:15,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 13:12:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:15,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 13:12:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:15,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 13:12:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:15,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:12:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:12:15,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:12:15,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813240784] [2022-12-13 13:12:15,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813240784] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:12:15,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:12:15,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:12:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149150591] [2022-12-13 13:12:15,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:12:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:12:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:12:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:12:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:12:15,672 INFO L87 Difference]: Start difference. First operand 1057 states and 1504 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 5 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 13:12:17,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:12:19,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:12:22,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:12:24,011 WARN L539 Checker$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 13:12:26,020 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 13:12:32,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:12:32,503 INFO L93 Difference]: Finished difference Result 2352 states and 3636 transitions. [2022-12-13 13:12:32,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 13:12:32,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 5 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 67 [2022-12-13 13:12:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:12:32,509 INFO L225 Difference]: With dead ends: 2352 [2022-12-13 13:12:32,509 INFO L226 Difference]: Without dead ends: 1408 [2022-12-13 13:12:32,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:12:32,512 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 298 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 87 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:12:32,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1761 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1760 Invalid, 5 Unknown, 0 Unchecked, 16.3s Time] [2022-12-13 13:12:32,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-12-13 13:12:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1096. [2022-12-13 13:12:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 814 states have (on average 1.3341523341523343) internal successors, (1086), 825 states have internal predecessors, (1086), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2022-12-13 13:12:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1602 transitions. [2022-12-13 13:12:32,604 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1602 transitions. Word has length 67 [2022-12-13 13:12:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:12:32,604 INFO L495 AbstractCegarLoop]: Abstraction has 1096 states and 1602 transitions. [2022-12-13 13:12:32,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 5 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 13:12:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1602 transitions. [2022-12-13 13:12:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 13:12:32,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:12:32,605 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:12:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 13:12:32,606 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:12:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:12:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1388270153, now seen corresponding path program 1 times [2022-12-13 13:12:32,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:12:32,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777297087] [2022-12-13 13:12:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:12:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:12:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 13:12:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 13:12:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 13:12:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-12-13 13:12:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-12-13 13:12:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:12:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:34,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 13:12:34,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:12:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777297087] [2022-12-13 13:12:34,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777297087] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:12:34,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:12:34,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 13:12:34,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376154290] [2022-12-13 13:12:34,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:12:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:12:34,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:12:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:12:34,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:12:34,298 INFO L87 Difference]: Start difference. First operand 1096 states and 1602 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:12:36,421 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 13:12:38,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:12:40,537 WARN L539 Checker$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 13:12:42,552 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 13:12:47,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:12:47,153 INFO L93 Difference]: Finished difference Result 2322 states and 3743 transitions. [2022-12-13 13:12:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 13:12:47,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 82 [2022-12-13 13:12:47,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:12:47,161 INFO L225 Difference]: With dead ends: 2322 [2022-12-13 13:12:47,161 INFO L226 Difference]: Without dead ends: 2319 [2022-12-13 13:12:47,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-12-13 13:12:47,162 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 616 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 251 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:12:47,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 1210 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1152 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2022-12-13 13:12:47,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2022-12-13 13:12:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1104. [2022-12-13 13:12:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 822 states have (on average 1.3357664233576643) internal successors, (1098), 833 states have internal predecessors, (1098), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2022-12-13 13:12:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1614 transitions. [2022-12-13 13:12:47,271 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1614 transitions. Word has length 82 [2022-12-13 13:12:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:12:47,271 INFO L495 AbstractCegarLoop]: Abstraction has 1104 states and 1614 transitions. [2022-12-13 13:12:47,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-12-13 13:12:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1614 transitions. [2022-12-13 13:12:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 13:12:47,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:12:47,272 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:12:47,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 13:12:47,272 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:12:47,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:12:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash -428373383, now seen corresponding path program 1 times [2022-12-13 13:12:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:12:47,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614807124] [2022-12-13 13:12:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:12:47,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:12:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-12-13 13:12:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-12-13 13:12:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-12-13 13:12:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:12:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:12:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:12:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:12:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:12:49,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:12:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614807124] [2022-12-13 13:12:49,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614807124] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:12:49,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047850841] [2022-12-13 13:12:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:12:49,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:12:49,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:12:49,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:12:49,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 13:12:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:12:54,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 10518 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 13:12:54,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:12:54,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:12:54,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:12:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:12:54,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047850841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:12:54,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:12:54,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2022-12-13 13:12:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830178000] [2022-12-13 13:12:54,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:12:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:12:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:12:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:12:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 13:12:54,878 INFO L87 Difference]: Start difference. First operand 1104 states and 1614 transitions. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 9 states have internal predecessors, (113), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 13:12:57,037 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 13:12:59,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:13:01,172 WARN L539 Checker$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 13:13:03,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:13:05,192 WARN L539 Checker$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 13:13:07,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:13:09,272 WARN L539 Checker$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 13:13:12,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-13 13:13:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:13:15,938 INFO L93 Difference]: Finished difference Result 2920 states and 4774 transitions. [2022-12-13 13:13:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:13:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 9 states have internal predecessors, (113), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2022-12-13 13:13:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:13:15,946 INFO L225 Difference]: With dead ends: 2920 [2022-12-13 13:13:15,946 INFO L226 Difference]: Without dead ends: 1822 [2022-12-13 13:13:15,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:13:15,949 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 833 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 542 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:13:15,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1225 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 1161 Invalid, 8 Unknown, 0 Unchecked, 20.7s Time] [2022-12-13 13:13:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-12-13 13:13:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1114. [2022-12-13 13:13:16,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 832 states have (on average 1.3317307692307692) internal successors, (1108), 843 states have internal predecessors, (1108), 195 states have call successors, (195), 78 states have call predecessors, (195), 86 states have return successors, (321), 196 states have call predecessors, (321), 188 states have call successors, (321) [2022-12-13 13:13:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1624 transitions. [2022-12-13 13:13:16,104 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1624 transitions. Word has length 83 [2022-12-13 13:13:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:13:16,104 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1624 transitions. [2022-12-13 13:13:16,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 9 states have internal predecessors, (113), 2 states have call successors, (21), 6 states have call predecessors, (21), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 13:13:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1624 transitions. [2022-12-13 13:13:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 13:13:16,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:13:16,105 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:16,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:13:16,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 13:13:16,306 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:13:16,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -460104214, now seen corresponding path program 2 times [2022-12-13 13:13:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:16,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198867787] [2022-12-13 13:13:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:16,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 13:13:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:13:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 13:13:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:13:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:13:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:13:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:13:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:13:18,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:18,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198867787] [2022-12-13 13:13:18,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198867787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:13:18,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522384276] [2022-12-13 13:13:18,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:13:18,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:13:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:13:18,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:13:18,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 13:13:24,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:13:24,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:13:24,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 10494 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:13:24,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:13:25,115 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 13:13:25,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:13:25,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522384276] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:25,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:13:25,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2022-12-13 13:13:25,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89605280] [2022-12-13 13:13:25,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:25,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:13:25,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:25,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:13:25,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:13:25,117 INFO L87 Difference]: Start difference. First operand 1114 states and 1624 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-13 13:13:25,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:13:25,266 INFO L93 Difference]: Finished difference Result 2104 states and 3184 transitions. [2022-12-13 13:13:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:13:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 93 [2022-12-13 13:13:25,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:13:25,269 INFO L225 Difference]: With dead ends: 2104 [2022-12-13 13:13:25,269 INFO L226 Difference]: Without dead ends: 1154 [2022-12-13 13:13:25,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:13:25,272 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 15 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1722 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 13:13:25,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 1722 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 13:13:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-12-13 13:13:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1133. [2022-12-13 13:13:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 848 states have (on average 1.3290094339622642) internal successors, (1127), 862 states have internal predecessors, (1127), 195 states have call successors, (195), 78 states have call predecessors, (195), 89 states have return successors, (337), 196 states have call predecessors, (337), 188 states have call successors, (337) [2022-12-13 13:13:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1659 transitions. [2022-12-13 13:13:25,397 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1659 transitions. Word has length 93 [2022-12-13 13:13:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:13:25,397 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1659 transitions. [2022-12-13 13:13:25,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-13 13:13:25,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1659 transitions. [2022-12-13 13:13:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 13:13:25,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:13:25,398 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:25,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 13:13:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 13:13:25,599 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:13:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1693169347, now seen corresponding path program 1 times [2022-12-13 13:13:25,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:25,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971592169] [2022-12-13 13:13:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 13:13:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:13:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 13:13:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:13:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:13:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:13:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:13:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:27,763 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 13:13:27,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:27,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971592169] [2022-12-13 13:13:27,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971592169] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:27,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 13:13:27,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561740159] [2022-12-13 13:13:27,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:27,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:13:27,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:13:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:13:27,765 INFO L87 Difference]: Start difference. First operand 1133 states and 1659 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 13:13:29,867 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 13:13:32,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:13:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:13:34,696 INFO L93 Difference]: Finished difference Result 1574 states and 2409 transitions. [2022-12-13 13:13:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 13:13:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2022-12-13 13:13:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:13:34,699 INFO L225 Difference]: With dead ends: 1574 [2022-12-13 13:13:34,699 INFO L226 Difference]: Without dead ends: 560 [2022-12-13 13:13:34,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:13:34,702 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 583 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 183 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-12-13 13:13:34,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 582 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 540 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-12-13 13:13:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-12-13 13:13:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 510. [2022-12-13 13:13:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 376 states have (on average 1.2872340425531914) internal successors, (484), 381 states have internal predecessors, (484), 96 states have call successors, (96), 36 states have call predecessors, (96), 37 states have return successors, (131), 94 states have call predecessors, (131), 92 states have call successors, (131) [2022-12-13 13:13:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 711 transitions. [2022-12-13 13:13:34,760 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 711 transitions. Word has length 93 [2022-12-13 13:13:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:13:34,760 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 711 transitions. [2022-12-13 13:13:34,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 4 states have internal predecessors, (65), 4 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 13:13:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 711 transitions. [2022-12-13 13:13:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-13 13:13:34,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:13:34,761 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:34,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 13:13:34,761 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:13:34,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1461133713, now seen corresponding path program 1 times [2022-12-13 13:13:34,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:34,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758323692] [2022-12-13 13:13:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 13:13:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:13:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 13:13:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:13:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:13:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:13:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:13:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:13:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:37,516 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 13:13:37,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:37,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758323692] [2022-12-13 13:13:37,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758323692] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:37,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:37,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 13:13:37,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515472411] [2022-12-13 13:13:37,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:37,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:13:37,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:13:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:13:37,517 INFO L87 Difference]: Start difference. First operand 510 states and 711 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 13:13:39,695 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 13:13:41,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:13:43,797 WARN L539 Checker$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 13:13:45,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:13:47,814 WARN L539 Checker$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 13:13:49,821 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 13:13:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:13:54,433 INFO L93 Difference]: Finished difference Result 946 states and 1395 transitions. [2022-12-13 13:13:54,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 13:13:54,434 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 97 [2022-12-13 13:13:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:13:54,436 INFO L225 Difference]: With dead ends: 946 [2022-12-13 13:13:54,436 INFO L226 Difference]: Without dead ends: 560 [2022-12-13 13:13:54,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:13:54,437 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 647 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 203 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:13:54,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 980 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1044 Invalid, 6 Unknown, 0 Unchecked, 16.3s Time] [2022-12-13 13:13:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-12-13 13:13:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 505. [2022-12-13 13:13:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 372 states have (on average 1.2849462365591398) internal successors, (478), 377 states have internal predecessors, (478), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (122), 93 states have call predecessors, (122), 92 states have call successors, (122) [2022-12-13 13:13:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 696 transitions. [2022-12-13 13:13:54,498 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 696 transitions. Word has length 97 [2022-12-13 13:13:54,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:13:54,498 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 696 transitions. [2022-12-13 13:13:54,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 13:13:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 696 transitions. [2022-12-13 13:13:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 13:13:54,498 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:13:54,499 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:13:54,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 13:13:54,499 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:13:54,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:13:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1790019497, now seen corresponding path program 1 times [2022-12-13 13:13:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:13:54,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540765188] [2022-12-13 13:13:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:13:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:13:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 13:13:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:56,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 13:13:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:56,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 13:13:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:56,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:13:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:13:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:13:56,562 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 13:13:56,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:13:56,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540765188] [2022-12-13 13:13:56,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540765188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:13:56,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:13:56,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:13:56,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552482952] [2022-12-13 13:13:56,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:13:56,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:13:56,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:13:56,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:13:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:13:56,563 INFO L87 Difference]: Start difference. First operand 505 states and 696 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-13 13:13:58,696 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 13:14:00,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:14:02,757 WARN L539 Checker$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 13:14:04,763 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 13:14:07,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:14:07,617 INFO L93 Difference]: Finished difference Result 947 states and 1385 transitions. [2022-12-13 13:14:07,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:14:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 85 [2022-12-13 13:14:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:14:07,621 INFO L225 Difference]: With dead ends: 947 [2022-12-13 13:14:07,621 INFO L226 Difference]: Without dead ends: 566 [2022-12-13 13:14:07,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:14:07,622 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 375 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 238 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:14:07,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 946 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 671 Invalid, 4 Unknown, 0 Unchecked, 10.8s Time] [2022-12-13 13:14:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-12-13 13:14:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 508. [2022-12-13 13:14:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 375 states have (on average 1.2826666666666666) internal successors, (481), 380 states have internal predecessors, (481), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (122), 93 states have call predecessors, (122), 92 states have call successors, (122) [2022-12-13 13:14:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 699 transitions. [2022-12-13 13:14:07,689 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 699 transitions. Word has length 85 [2022-12-13 13:14:07,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:14:07,690 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 699 transitions. [2022-12-13 13:14:07,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-12-13 13:14:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 699 transitions. [2022-12-13 13:14:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 13:14:07,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:14:07,691 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:07,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 13:14:07,691 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:14:07,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:07,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1493830549, now seen corresponding path program 1 times [2022-12-13 13:14:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:07,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854942461] [2022-12-13 13:14:07,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:07,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 13:14:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 13:14:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 13:14:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:14:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:14:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:10,418 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 13:14:10,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:10,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854942461] [2022-12-13 13:14:10,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854942461] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:10,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:10,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 13:14:10,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923651021] [2022-12-13 13:14:10,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:10,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 13:14:10,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:10,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 13:14:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 13:14:10,420 INFO L87 Difference]: Start difference. First operand 508 states and 699 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:14:12,587 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 13:14:14,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:14:16,673 WARN L539 Checker$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 13:14:18,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:14:20,687 WARN L539 Checker$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 13:14:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:14:27,392 INFO L93 Difference]: Finished difference Result 1093 states and 1594 transitions. [2022-12-13 13:14:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:14:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 85 [2022-12-13 13:14:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:14:27,395 INFO L225 Difference]: With dead ends: 1093 [2022-12-13 13:14:27,395 INFO L226 Difference]: Without dead ends: 726 [2022-12-13 13:14:27,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-12-13 13:14:27,397 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 1638 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 879 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1695 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 2268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:14:27,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1695 Valid, 971 Invalid, 2268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 1384 Invalid, 5 Unknown, 0 Unchecked, 15.7s Time] [2022-12-13 13:14:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-12-13 13:14:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 505. [2022-12-13 13:14:27,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 372 states have (on average 1.2741935483870968) internal successors, (474), 377 states have internal predecessors, (474), 96 states have call successors, (96), 36 states have call predecessors, (96), 36 states have return successors, (117), 93 states have call predecessors, (117), 92 states have call successors, (117) [2022-12-13 13:14:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 687 transitions. [2022-12-13 13:14:27,466 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 687 transitions. Word has length 85 [2022-12-13 13:14:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:14:27,466 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 687 transitions. [2022-12-13 13:14:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 4 states have call successors, (8), 8 states have call predecessors, (8), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:14:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 687 transitions. [2022-12-13 13:14:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 13:14:27,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:14:27,467 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 13:14:27,467 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:14:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1077544809, now seen corresponding path program 1 times [2022-12-13 13:14:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:27,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42766343] [2022-12-13 13:14:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:29,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 13:14:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 13:14:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:29,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-12-13 13:14:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:29,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:14:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:14:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:29,721 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 13:14:29,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:29,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42766343] [2022-12-13 13:14:29,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42766343] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:14:29,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:14:29,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 13:14:29,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983731240] [2022-12-13 13:14:29,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:14:29,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 13:14:29,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:29,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 13:14:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 13:14:29,723 INFO L87 Difference]: Start difference. First operand 505 states and 687 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:14:31,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:14:33,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:14:35,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:14:37,955 WARN L539 Checker$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 13:14:39,967 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 13:14:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:14:44,657 INFO L93 Difference]: Finished difference Result 1142 states and 1637 transitions. [2022-12-13 13:14:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:14:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 85 [2022-12-13 13:14:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:14:44,661 INFO L225 Difference]: With dead ends: 1142 [2022-12-13 13:14:44,661 INFO L226 Difference]: Without dead ends: 764 [2022-12-13 13:14:44,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-12-13 13:14:44,663 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 646 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 314 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-12-13 13:14:44,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 896 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 839 Invalid, 5 Unknown, 0 Unchecked, 14.3s Time] [2022-12-13 13:14:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2022-12-13 13:14:44,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 664. [2022-12-13 13:14:44,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 484 states have (on average 1.2706611570247934) internal successors, (615), 491 states have internal predecessors, (615), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2022-12-13 13:14:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 902 transitions. [2022-12-13 13:14:44,790 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 902 transitions. Word has length 85 [2022-12-13 13:14:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:14:44,790 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 902 transitions. [2022-12-13 13:14:44,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 13:14:44,790 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 902 transitions. [2022-12-13 13:14:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 13:14:44,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:14:44,791 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:14:44,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 13:14:44,792 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:14:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:14:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1559299469, now seen corresponding path program 1 times [2022-12-13 13:14:44,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:14:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360760927] [2022-12-13 13:14:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:14:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-12-13 13:14:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:14:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 13:14:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:14:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:14:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:14:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:14:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:14:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:14:47,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:14:47,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360760927] [2022-12-13 13:14:47,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360760927] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:14:47,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266984896] [2022-12-13 13:14:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:14:47,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:14:47,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:14:47,819 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:14:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 13:14:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:14:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 10584 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 13:14:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:14:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:14:54,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:14:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 13:14:54,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266984896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:14:54,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:14:54,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 22 [2022-12-13 13:14:54,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379483131] [2022-12-13 13:14:54,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:14:54,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 13:14:54,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:14:54,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 13:14:54,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2022-12-13 13:14:54,812 INFO L87 Difference]: Start difference. First operand 664 states and 902 transitions. Second operand has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 17 states have internal predecessors, (140), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-13 13:14:57,080 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 13:14:59,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:15:03,904 INFO L93 Difference]: Finished difference Result 1406 states and 1979 transitions. [2022-12-13 13:15:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 13:15:03,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 17 states have internal predecessors, (140), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 100 [2022-12-13 13:15:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:15:03,907 INFO L225 Difference]: With dead ends: 1406 [2022-12-13 13:15:03,907 INFO L226 Difference]: Without dead ends: 756 [2022-12-13 13:15:03,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:15:03,909 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 816 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1064 mSolverCounterSat, 345 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1064 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-12-13 13:15:03,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1165 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 1064 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-12-13 13:15:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-12-13 13:15:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 682. [2022-12-13 13:15:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 502 states have (on average 1.2609561752988048) internal successors, (633), 509 states have internal predecessors, (633), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2022-12-13 13:15:03,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 920 transitions. [2022-12-13 13:15:03,989 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 920 transitions. Word has length 100 [2022-12-13 13:15:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:15:03,990 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 920 transitions. [2022-12-13 13:15:03,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.363636363636363) internal successors, (140), 17 states have internal predecessors, (140), 2 states have call successors, (24), 7 states have call predecessors, (24), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-13 13:15:03,990 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 920 transitions. [2022-12-13 13:15:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-13 13:15:03,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:15:03,991 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:15:04,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 13:15:04,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:15:04,192 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:15:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:04,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1832754480, now seen corresponding path program 2 times [2022-12-13 13:15:04,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:15:04,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028596779] [2022-12-13 13:15:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:04,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:15:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:07,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 13:15:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:07,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 13:15:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 13:15:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:15:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:15:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:15:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:15:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:15:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:15:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:15:08,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028596779] [2022-12-13 13:15:08,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028596779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:15:08,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922391088] [2022-12-13 13:15:08,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:15:08,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:15:08,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:15:08,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:15:08,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 13:15:14,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 13:15:14,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:15:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 10509 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:15:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:15:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-12-13 13:15:15,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:15:15,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922391088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:15:15,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:15:15,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [22] total 26 [2022-12-13 13:15:15,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843349617] [2022-12-13 13:15:15,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:15,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:15:15,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:15:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:15:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2022-12-13 13:15:15,044 INFO L87 Difference]: Start difference. First operand 682 states and 920 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-13 13:15:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:15:15,284 INFO L93 Difference]: Finished difference Result 1207 states and 1657 transitions. [2022-12-13 13:15:15,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:15:15,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 118 [2022-12-13 13:15:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:15:15,286 INFO L225 Difference]: With dead ends: 1207 [2022-12-13 13:15:15,286 INFO L226 Difference]: Without dead ends: 682 [2022-12-13 13:15:15,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2022-12-13 13:15:15,287 INFO L413 NwaCegarLoop]: 374 mSDtfsCounter, 2 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 13:15:15,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1845 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 13:15:15,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-12-13 13:15:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2022-12-13 13:15:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 502 states have (on average 1.254980079681275) internal successors, (630), 509 states have internal predecessors, (630), 129 states have call successors, (129), 47 states have call predecessors, (129), 50 states have return successors, (158), 128 states have call predecessors, (158), 126 states have call successors, (158) [2022-12-13 13:15:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 917 transitions. [2022-12-13 13:15:15,365 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 917 transitions. Word has length 118 [2022-12-13 13:15:15,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:15:15,365 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 917 transitions. [2022-12-13 13:15:15,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-12-13 13:15:15,366 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 917 transitions. [2022-12-13 13:15:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-13 13:15:15,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:15:15,366 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:15:15,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 13:15:15,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:15:15,568 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:15:15,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -605554184, now seen corresponding path program 1 times [2022-12-13 13:15:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:15:15,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975914787] [2022-12-13 13:15:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:15:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-12-13 13:15:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:17,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 13:15:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:17,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 13:15:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-12-13 13:15:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:17,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-12-13 13:15:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:18,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-12-13 13:15:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-12-13 13:15:18,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:15:18,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975914787] [2022-12-13 13:15:18,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975914787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:15:18,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:15:18,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 13:15:18,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443585817] [2022-12-13 13:15:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:18,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 13:15:18,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:15:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 13:15:18,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 13:15:18,021 INFO L87 Difference]: Start difference. First operand 682 states and 917 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:15:20,151 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 13:15:22,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:24,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:26,290 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 13:15:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:15:30,894 INFO L93 Difference]: Finished difference Result 770 states and 1094 transitions. [2022-12-13 13:15:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 13:15:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 110 [2022-12-13 13:15:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:15:30,898 INFO L225 Difference]: With dead ends: 770 [2022-12-13 13:15:30,898 INFO L226 Difference]: Without dead ends: 707 [2022-12-13 13:15:30,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:15:30,900 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 231 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 116 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:15:30,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1307 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1067 Invalid, 4 Unknown, 0 Unchecked, 12.5s Time] [2022-12-13 13:15:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-12-13 13:15:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 637. [2022-12-13 13:15:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 468 states have (on average 1.2585470085470085) internal successors, (589), 475 states have internal predecessors, (589), 122 states have call successors, (122), 43 states have call predecessors, (122), 46 states have return successors, (151), 121 states have call predecessors, (151), 119 states have call successors, (151) [2022-12-13 13:15:30,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 862 transitions. [2022-12-13 13:15:30,995 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 862 transitions. Word has length 110 [2022-12-13 13:15:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:15:30,995 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 862 transitions. [2022-12-13 13:15:30,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 13:15:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 862 transitions. [2022-12-13 13:15:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-13 13:15:30,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:15:30,996 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:15:30,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 13:15:30,996 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:15:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1306714324, now seen corresponding path program 1 times [2022-12-13 13:15:30,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:15:30,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533056894] [2022-12-13 13:15:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:15:32,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 13:15:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:32,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 13:15:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:32,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 13:15:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:15:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:15:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:15:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:15:33,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:15:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:15:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:15:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-12-13 13:15:33,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:15:33,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533056894] [2022-12-13 13:15:33,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533056894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:15:33,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:15:33,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 13:15:33,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514712567] [2022-12-13 13:15:33,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:15:33,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:15:33,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:15:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:15:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:15:33,267 INFO L87 Difference]: Start difference. First operand 637 states and 862 transitions. Second operand has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:15:35,459 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 13:15:37,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:39,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:41,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:43,627 WARN L539 Checker$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 13:15:45,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:47,647 WARN L539 Checker$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 13:15:49,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:15:51,664 WARN L539 Checker$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 13:15:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:15:58,033 INFO L93 Difference]: Finished difference Result 1202 states and 1696 transitions. [2022-12-13 13:15:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 13:15:58,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 128 [2022-12-13 13:15:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:15:58,036 INFO L225 Difference]: With dead ends: 1202 [2022-12-13 13:15:58,036 INFO L226 Difference]: Without dead ends: 679 [2022-12-13 13:15:58,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2022-12-13 13:15:58,037 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 436 mSDsluCounter, 1160 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 189 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:15:58,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 1498 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1576 Invalid, 9 Unknown, 0 Unchecked, 23.8s Time] [2022-12-13 13:15:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-12-13 13:15:58,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 607. [2022-12-13 13:15:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 445 states have (on average 1.2606741573033708) internal successors, (561), 454 states have internal predecessors, (561), 118 states have call successors, (118), 43 states have call predecessors, (118), 43 states have return successors, (134), 112 states have call predecessors, (134), 115 states have call successors, (134) [2022-12-13 13:15:58,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 813 transitions. [2022-12-13 13:15:58,118 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 813 transitions. Word has length 128 [2022-12-13 13:15:58,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:15:58,118 INFO L495 AbstractCegarLoop]: Abstraction has 607 states and 813 transitions. [2022-12-13 13:15:58,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.8) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (11), 8 states have call predecessors, (11), 4 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:15:58,118 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 813 transitions. [2022-12-13 13:15:58,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 13:15:58,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:15:58,119 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:15:58,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 13:15:58,119 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:15:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:15:58,119 INFO L85 PathProgramCache]: Analyzing trace with hash -958195155, now seen corresponding path program 1 times [2022-12-13 13:15:58,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:15:58,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446869441] [2022-12-13 13:15:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:15:58,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:15:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:01,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 13:16:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:01,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 13:16:01,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:01,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 13:16:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:01,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:16:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:01,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:16:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:01,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:16:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:16:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:02,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:16:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:02,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-12-13 13:16:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2022-12-13 13:16:02,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:16:02,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446869441] [2022-12-13 13:16:02,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446869441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:16:02,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:16:02,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-13 13:16:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926725803] [2022-12-13 13:16:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:16:02,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:16:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:16:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:16:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:16:02,097 INFO L87 Difference]: Start difference. First operand 607 states and 813 transitions. Second operand has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:16:04,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:06,248 WARN L539 Checker$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 13:16:08,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:10,324 WARN L539 Checker$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 13:16:12,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:14,341 WARN L539 Checker$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 13:16:16,348 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 13:16:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:16:23,245 INFO L93 Difference]: Finished difference Result 706 states and 1003 transitions. [2022-12-13 13:16:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 13:16:23,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 134 [2022-12-13 13:16:23,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:16:23,249 INFO L225 Difference]: With dead ends: 706 [2022-12-13 13:16:23,249 INFO L226 Difference]: Without dead ends: 686 [2022-12-13 13:16:23,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-12-13 13:16:23,250 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 356 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 160 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:16:23,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 2641 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2260 Invalid, 7 Unknown, 0 Unchecked, 20.4s Time] [2022-12-13 13:16:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-12-13 13:16:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 610. [2022-12-13 13:16:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 447 states have (on average 1.2595078299776286) internal successors, (563), 457 states have internal predecessors, (563), 118 states have call successors, (118), 43 states have call predecessors, (118), 44 states have return successors, (135), 112 states have call predecessors, (135), 115 states have call successors, (135) [2022-12-13 13:16:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 816 transitions. [2022-12-13 13:16:23,337 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 816 transitions. Word has length 134 [2022-12-13 13:16:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:16:23,337 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 816 transitions. [2022-12-13 13:16:23,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.722222222222222) internal successors, (85), 11 states have internal predecessors, (85), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:16:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 816 transitions. [2022-12-13 13:16:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-12-13 13:16:23,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:16:23,338 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:23,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-13 13:16:23,338 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:16:23,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1665416912, now seen corresponding path program 1 times [2022-12-13 13:16:23,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:16:23,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969039614] [2022-12-13 13:16:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:23,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:16:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:26,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 13:16:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-12-13 13:16:27,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-12-13 13:16:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:16:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:16:27,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:16:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:16:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:16:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-12-13 13:16:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:16:27,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:16:27,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969039614] [2022-12-13 13:16:27,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969039614] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:16:27,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169888536] [2022-12-13 13:16:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:27,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:16:27,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:16:27,455 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:16:27,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 13:16:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 10702 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 13:16:35,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:16:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:16:35,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:16:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 13:16:36,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169888536] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:16:36,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 13:16:36,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 36 [2022-12-13 13:16:36,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049164360] [2022-12-13 13:16:36,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 13:16:36,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 13:16:36,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:16:36,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 13:16:36,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=778, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 13:16:36,347 INFO L87 Difference]: Start difference. First operand 610 states and 816 transitions. Second operand has 36 states, 36 states have (on average 5.305555555555555) internal successors, (191), 31 states have internal predecessors, (191), 2 states have call successors, (26), 7 states have call predecessors, (26), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-13 13:16:38,733 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 13:16:40,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:43,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:45,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:47,043 WARN L539 Checker$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 13:16:49,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:16:51,057 WARN L539 Checker$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 13:16:55,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:16:55,759 INFO L93 Difference]: Finished difference Result 1288 states and 1796 transitions. [2022-12-13 13:16:55,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 13:16:55,760 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.305555555555555) internal successors, (191), 31 states have internal predecessors, (191), 2 states have call successors, (26), 7 states have call predecessors, (26), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 135 [2022-12-13 13:16:55,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:16:55,763 INFO L225 Difference]: With dead ends: 1288 [2022-12-13 13:16:55,763 INFO L226 Difference]: Without dead ends: 708 [2022-12-13 13:16:55,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 270 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=510, Invalid=1050, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 13:16:55,765 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 678 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 295 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-12-13 13:16:55,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1283 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 1349 Invalid, 7 Unknown, 0 Unchecked, 18.9s Time] [2022-12-13 13:16:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-12-13 13:16:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 638. [2022-12-13 13:16:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 475 states have (on average 1.2442105263157894) internal successors, (591), 485 states have internal predecessors, (591), 118 states have call successors, (118), 43 states have call predecessors, (118), 44 states have return successors, (135), 112 states have call predecessors, (135), 115 states have call successors, (135) [2022-12-13 13:16:55,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 844 transitions. [2022-12-13 13:16:55,852 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 844 transitions. Word has length 135 [2022-12-13 13:16:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:16:55,853 INFO L495 AbstractCegarLoop]: Abstraction has 638 states and 844 transitions. [2022-12-13 13:16:55,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.305555555555555) internal successors, (191), 31 states have internal predecessors, (191), 2 states have call successors, (26), 7 states have call predecessors, (26), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-13 13:16:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 844 transitions. [2022-12-13 13:16:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-12-13 13:16:55,854 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:16:55,854 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:16:55,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 13:16:56,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 13:16:56,055 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:16:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:16:56,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1963891722, now seen corresponding path program 2 times [2022-12-13 13:16:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:16:56,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539155496] [2022-12-13 13:16:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:16:56,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:16:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:59,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 13:16:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:16:59,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-12-13 13:16:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-12-13 13:17:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:17:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:17:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:17:00,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:17:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:17:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2022-12-13 13:17:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:17:00,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:17:00,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539155496] [2022-12-13 13:17:00,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539155496] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:17:00,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:17:00,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-13 13:17:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146596983] [2022-12-13 13:17:00,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:17:00,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 13:17:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:17:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 13:17:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:17:00,739 INFO L87 Difference]: Start difference. First operand 638 states and 844 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:17:02,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:04,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:07,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:09,111 WARN L539 Checker$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 13:17:11,118 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 13:17:18,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:17:18,420 INFO L93 Difference]: Finished difference Result 1221 states and 1694 transitions. [2022-12-13 13:17:18,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 13:17:18,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 163 [2022-12-13 13:17:18,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:17:18,424 INFO L225 Difference]: With dead ends: 1221 [2022-12-13 13:17:18,424 INFO L226 Difference]: Without dead ends: 710 [2022-12-13 13:17:18,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-12-13 13:17:18,426 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 341 mSDsluCounter, 2576 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 162 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 2833 SdHoareTripleChecker+Invalid, 2495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:17:18,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 2833 Invalid, 2495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 2328 Invalid, 5 Unknown, 0 Unchecked, 16.8s Time] [2022-12-13 13:17:18,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-12-13 13:17:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 623. [2022-12-13 13:17:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 464 states have (on average 1.2478448275862069) internal successors, (579), 473 states have internal predecessors, (579), 116 states have call successors, (116), 43 states have call predecessors, (116), 42 states have return successors, (126), 109 states have call predecessors, (126), 113 states have call successors, (126) [2022-12-13 13:17:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 821 transitions. [2022-12-13 13:17:18,551 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 821 transitions. Word has length 163 [2022-12-13 13:17:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:17:18,552 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 821 transitions. [2022-12-13 13:17:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:17:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 821 transitions. [2022-12-13 13:17:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-13 13:17:18,553 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:17:18,553 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:18,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-13 13:17:18,553 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:17:18,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:17:18,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1226776691, now seen corresponding path program 1 times [2022-12-13 13:17:18,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:17:18,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391459171] [2022-12-13 13:17:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:17:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:17:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 13:17:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:21,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-12-13 13:17:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-12-13 13:17:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:17:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:17:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:17:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:17:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:17:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:17:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-12-13 13:17:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:17:22,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:17:22,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391459171] [2022-12-13 13:17:22,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391459171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:17:22,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:17:22,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-13 13:17:22,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069298438] [2022-12-13 13:17:22,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:17:22,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:17:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:17:22,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:17:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:17:22,634 INFO L87 Difference]: Start difference. First operand 623 states and 821 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:17:24,828 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 13:17:26,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:28,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:31,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:33,016 WARN L539 Checker$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 13:17:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:17:42,569 INFO L93 Difference]: Finished difference Result 1305 states and 1858 transitions. [2022-12-13 13:17:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 13:17:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2022-12-13 13:17:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:17:42,573 INFO L225 Difference]: With dead ends: 1305 [2022-12-13 13:17:42,573 INFO L226 Difference]: Without dead ends: 1256 [2022-12-13 13:17:42,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 13:17:42,574 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1211 mSDsluCounter, 2033 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 603 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:17:42,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 2334 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 2649 Invalid, 5 Unknown, 0 Unchecked, 18.2s Time] [2022-12-13 13:17:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-12-13 13:17:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1090. [2022-12-13 13:17:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1090 states, 787 states have (on average 1.2744599745870393) internal successors, (1003), 822 states have internal predecessors, (1003), 222 states have call successors, (222), 80 states have call predecessors, (222), 80 states have return successors, (245), 190 states have call predecessors, (245), 219 states have call successors, (245) [2022-12-13 13:17:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1090 states to 1090 states and 1470 transitions. [2022-12-13 13:17:42,723 INFO L78 Accepts]: Start accepts. Automaton has 1090 states and 1470 transitions. Word has length 172 [2022-12-13 13:17:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:17:42,723 INFO L495 AbstractCegarLoop]: Abstraction has 1090 states and 1470 transitions. [2022-12-13 13:17:42,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:17:42,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1090 states and 1470 transitions. [2022-12-13 13:17:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-13 13:17:42,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:17:42,725 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:17:42,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-13 13:17:42,725 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:17:42,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:17:42,725 INFO L85 PathProgramCache]: Analyzing trace with hash -639931983, now seen corresponding path program 1 times [2022-12-13 13:17:42,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:17:42,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953553036] [2022-12-13 13:17:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:17:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:17:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-12-13 13:17:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:45,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-12-13 13:17:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:45,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-12-13 13:17:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:17:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:17:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:17:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:17:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:17:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:17:46,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-12-13 13:17:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:17:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:17:46,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:17:46,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953553036] [2022-12-13 13:17:46,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953553036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:17:46,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:17:46,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-13 13:17:46,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009526683] [2022-12-13 13:17:46,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:17:46,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 13:17:46,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:17:46,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 13:17:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-13 13:17:46,498 INFO L87 Difference]: Start difference. First operand 1090 states and 1470 transitions. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:17:48,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:50,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:52,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:17:54,885 WARN L539 Checker$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 13:17:56,890 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 13:18:07,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:18:07,987 INFO L93 Difference]: Finished difference Result 1276 states and 1817 transitions. [2022-12-13 13:18:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 13:18:07,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2022-12-13 13:18:07,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:18:07,992 INFO L225 Difference]: With dead ends: 1276 [2022-12-13 13:18:07,992 INFO L226 Difference]: Without dead ends: 1227 [2022-12-13 13:18:07,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=217, Invalid=1189, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 13:18:07,993 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 692 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 202 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 3785 SdHoareTripleChecker+Invalid, 3646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2022-12-13 13:18:07,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 3785 Invalid, 3646 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [202 Valid, 3439 Invalid, 5 Unknown, 0 Unchecked, 19.9s Time] [2022-12-13 13:18:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2022-12-13 13:18:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 597. [2022-12-13 13:18:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 444 states have (on average 1.2387387387387387) internal successors, (550), 453 states have internal predecessors, (550), 112 states have call successors, (112), 41 states have call predecessors, (112), 40 states have return successors, (122), 105 states have call predecessors, (122), 109 states have call successors, (122) [2022-12-13 13:18:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 784 transitions. [2022-12-13 13:18:08,086 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 784 transitions. Word has length 172 [2022-12-13 13:18:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:18:08,087 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 784 transitions. [2022-12-13 13:18:08,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 10 states have internal predecessors, (93), 4 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:18:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 784 transitions. [2022-12-13 13:18:08,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-13 13:18:08,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:18:08,088 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:08,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-13 13:18:08,088 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:18:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:18:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1524033808, now seen corresponding path program 1 times [2022-12-13 13:18:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:18:08,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784128253] [2022-12-13 13:18:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:18:08,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:18:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:18:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:18:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:18:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:18:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:18:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:18:10,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-12-13 13:18:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-12-13 13:18:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-12-13 13:18:10,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:18:10,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:18:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784128253] [2022-12-13 13:18:10,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784128253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:18:10,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:18:10,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 13:18:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458616765] [2022-12-13 13:18:10,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:18:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:18:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:18:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:18:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:18:10,691 INFO L87 Difference]: Start difference. First operand 597 states and 784 transitions. Second operand has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:18:12,881 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 13:18:14,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:16,998 WARN L539 Checker$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 13:18:19,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:21,154 WARN L539 Checker$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 13:18:23,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:25,175 WARN L539 Checker$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 13:18:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:18:30,234 INFO L93 Difference]: Finished difference Result 838 states and 1212 transitions. [2022-12-13 13:18:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 13:18:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 166 [2022-12-13 13:18:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:18:30,238 INFO L225 Difference]: With dead ends: 838 [2022-12-13 13:18:30,238 INFO L226 Difference]: Without dead ends: 766 [2022-12-13 13:18:30,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:18:30,239 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 382 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 166 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 1520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-12-13 13:18:30,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1375 Invalid, 1520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1347 Invalid, 7 Unknown, 0 Unchecked, 18.9s Time] [2022-12-13 13:18:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-12-13 13:18:30,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 605. [2022-12-13 13:18:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 450 states have (on average 1.2355555555555555) internal successors, (556), 459 states have internal predecessors, (556), 112 states have call successors, (112), 41 states have call predecessors, (112), 42 states have return successors, (130), 107 states have call predecessors, (130), 109 states have call successors, (130) [2022-12-13 13:18:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 798 transitions. [2022-12-13 13:18:30,333 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 798 transitions. Word has length 166 [2022-12-13 13:18:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:18:30,334 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 798 transitions. [2022-12-13 13:18:30,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.416666666666667) internal successors, (89), 4 states have internal predecessors, (89), 2 states have call successors, (10), 9 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:18:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 798 transitions. [2022-12-13 13:18:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-12-13 13:18:30,334 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:18:30,334 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:18:30,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-13 13:18:30,335 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:18:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:18:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash -161101711, now seen corresponding path program 1 times [2022-12-13 13:18:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:18:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367341783] [2022-12-13 13:18:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:18:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:18:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:33,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:18:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:33,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:18:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:33,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:18:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:18:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:18:34,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:18:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-12-13 13:18:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-12-13 13:18:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-12-13 13:18:34,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:18:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:18:34,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:18:34,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367341783] [2022-12-13 13:18:34,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367341783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:18:34,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:18:34,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-13 13:18:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856659534] [2022-12-13 13:18:34,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:18:34,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 13:18:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:18:34,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 13:18:34,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:18:34,545 INFO L87 Difference]: Start difference. First operand 605 states and 798 transitions. Second operand has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:18:36,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:38,756 WARN L539 Checker$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 13:18:40,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:42,789 WARN L539 Checker$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 13:18:44,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:46,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:48,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:18:50,934 WARN L539 Checker$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 13:18:52,940 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 13:19:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:19:03,137 INFO L93 Difference]: Finished difference Result 943 states and 1499 transitions. [2022-12-13 13:19:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 13:19:03,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 166 [2022-12-13 13:19:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:19:03,141 INFO L225 Difference]: With dead ends: 943 [2022-12-13 13:19:03,141 INFO L226 Difference]: Without dead ends: 855 [2022-12-13 13:19:03,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:19:03,143 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 506 mSDsluCounter, 2011 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 262 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 3825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-12-13 13:19:03,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 2256 Invalid, 3825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 3554 Invalid, 9 Unknown, 0 Unchecked, 27.4s Time] [2022-12-13 13:19:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-12-13 13:19:03,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 766. [2022-12-13 13:19:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 553 states have (on average 1.2278481012658229) internal successors, (679), 567 states have internal predecessors, (679), 168 states have call successors, (168), 41 states have call predecessors, (168), 44 states have return successors, (207), 161 states have call predecessors, (207), 164 states have call successors, (207) [2022-12-13 13:19:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1054 transitions. [2022-12-13 13:19:03,255 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1054 transitions. Word has length 166 [2022-12-13 13:19:03,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:19:03,255 INFO L495 AbstractCegarLoop]: Abstraction has 766 states and 1054 transitions. [2022-12-13 13:19:03,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.45) internal successors, (89), 11 states have internal predecessors, (89), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:19:03,255 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1054 transitions. [2022-12-13 13:19:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-13 13:19:03,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:19:03,256 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:03,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-13 13:19:03,256 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:19:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:19:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1557224420, now seen corresponding path program 1 times [2022-12-13 13:19:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:19:03,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647868972] [2022-12-13 13:19:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:19:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:19:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:06,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:19:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:06,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:19:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:06,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:19:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:19:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:19:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:19:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-12-13 13:19:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-12-13 13:19:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-12-13 13:19:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:19:07,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:19:07,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647868972] [2022-12-13 13:19:07,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647868972] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:19:07,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:19:07,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-12-13 13:19:07,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494462997] [2022-12-13 13:19:07,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:19:07,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 13:19:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:19:07,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 13:19:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-12-13 13:19:07,624 INFO L87 Difference]: Start difference. First operand 766 states and 1054 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:19:09,808 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 13:19:11,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:13,937 WARN L539 Checker$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 13:19:15,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:17,967 WARN L539 Checker$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 13:19:20,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:22,117 WARN L539 Checker$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 13:19:24,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:26,127 WARN L539 Checker$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 13:19:28,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:30,145 WARN L539 Checker$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 13:19:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:19:42,089 INFO L93 Difference]: Finished difference Result 1083 states and 1761 transitions. [2022-12-13 13:19:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 13:19:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) Word has length 167 [2022-12-13 13:19:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:19:42,093 INFO L225 Difference]: With dead ends: 1083 [2022-12-13 13:19:42,093 INFO L226 Difference]: Without dead ends: 995 [2022-12-13 13:19:42,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 13:19:42,094 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 450 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 3829 mSolverCounterSat, 117 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 3933 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3829 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:19:42,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 3933 Invalid, 3957 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [117 Valid, 3829 Invalid, 11 Unknown, 0 Unchecked, 33.2s Time] [2022-12-13 13:19:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-12-13 13:19:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 743. [2022-12-13 13:19:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 536 states have (on average 1.2332089552238805) internal successors, (661), 549 states have internal predecessors, (661), 165 states have call successors, (165), 41 states have call predecessors, (165), 41 states have return successors, (187), 156 states have call predecessors, (187), 161 states have call successors, (187) [2022-12-13 13:19:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1013 transitions. [2022-12-13 13:19:42,211 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1013 transitions. Word has length 167 [2022-12-13 13:19:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:19:42,212 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1013 transitions. [2022-12-13 13:19:42,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 11 states have internal predecessors, (90), 3 states have call successors, (10), 9 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 13:19:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1013 transitions. [2022-12-13 13:19:42,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 13:19:42,213 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:19:42,213 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:42,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-13 13:19:42,213 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:19:42,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:19:42,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1472821169, now seen corresponding path program 1 times [2022-12-13 13:19:42,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:19:42,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706606020] [2022-12-13 13:19:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:19:42,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:19:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:19:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:19:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:19:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:19:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:19:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:19:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:19:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-12-13 13:19:45,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-12-13 13:19:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:45,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-12-13 13:19:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:19:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:19:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:19:46,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706606020] [2022-12-13 13:19:46,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706606020] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:19:46,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:19:46,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-13 13:19:46,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044884040] [2022-12-13 13:19:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:19:46,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 13:19:46,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:19:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 13:19:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:19:46,003 INFO L87 Difference]: Start difference. First operand 743 states and 1013 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:19:48,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:50,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:52,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:54,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:19:56,565 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 13:20:10,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:20:10,753 INFO L93 Difference]: Finished difference Result 1582 states and 2404 transitions. [2022-12-13 13:20:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 13:20:10,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 176 [2022-12-13 13:20:10,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:20:10,758 INFO L225 Difference]: With dead ends: 1582 [2022-12-13 13:20:10,758 INFO L226 Difference]: Without dead ends: 1404 [2022-12-13 13:20:10,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 13:20:10,760 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 1069 mSDsluCounter, 2758 mSDsCounter, 0 mSdLazyCounter, 4186 mSolverCounterSat, 495 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 3097 SdHoareTripleChecker+Invalid, 4686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 4186 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:20:10,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 3097 Invalid, 4686 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [495 Valid, 4186 Invalid, 5 Unknown, 0 Unchecked, 22.5s Time] [2022-12-13 13:20:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-12-13 13:20:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1254. [2022-12-13 13:20:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 891 states have (on average 1.2222222222222223) internal successors, (1089), 918 states have internal predecessors, (1089), 289 states have call successors, (289), 73 states have call predecessors, (289), 73 states have return successors, (326), 267 states have call predecessors, (326), 284 states have call successors, (326) [2022-12-13 13:20:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1704 transitions. [2022-12-13 13:20:10,959 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1704 transitions. Word has length 176 [2022-12-13 13:20:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:20:10,959 INFO L495 AbstractCegarLoop]: Abstraction has 1254 states and 1704 transitions. [2022-12-13 13:20:10,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:20:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1704 transitions. [2022-12-13 13:20:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-13 13:20:10,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:20:10,960 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:20:10,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-13 13:20:10,960 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:20:10,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:10,961 INFO L85 PathProgramCache]: Analyzing trace with hash 849539567, now seen corresponding path program 1 times [2022-12-13 13:20:10,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:20:10,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473919651] [2022-12-13 13:20:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:20:10,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:20:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:20:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:20:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:20:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:20:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:20:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:20:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 13:20:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-12-13 13:20:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-12-13 13:20:14,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-12-13 13:20:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2022-12-13 13:20:14,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:20:14,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473919651] [2022-12-13 13:20:14,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473919651] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:20:14,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:20:14,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-12-13 13:20:14,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169164382] [2022-12-13 13:20:14,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:20:14,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 13:20:14,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:20:14,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 13:20:14,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:20:14,870 INFO L87 Difference]: Start difference. First operand 1254 states and 1704 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:20:17,100 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 13:20:19,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:20:21,208 WARN L539 Checker$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 13:20:23,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:20:25,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:20:27,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:20:29,342 WARN L539 Checker$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 13:20:31,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:20:33,362 WARN L539 Checker$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 13:20:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:20:49,914 INFO L93 Difference]: Finished difference Result 1408 states and 2090 transitions. [2022-12-13 13:20:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 13:20:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 176 [2022-12-13 13:20:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:20:49,919 INFO L225 Difference]: With dead ends: 1408 [2022-12-13 13:20:49,919 INFO L226 Difference]: Without dead ends: 1228 [2022-12-13 13:20:49,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 13:20:49,920 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 924 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 4950 mSolverCounterSat, 449 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 5408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 4950 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2022-12-13 13:20:49,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 4170 Invalid, 5408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [449 Valid, 4950 Invalid, 9 Unknown, 0 Unchecked, 32.8s Time] [2022-12-13 13:20:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2022-12-13 13:20:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 451. [2022-12-13 13:20:50,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 345 states have (on average 1.1623188405797102) internal successors, (401), 351 states have internal predecessors, (401), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (80), 67 states have call predecessors, (80), 70 states have call successors, (80) [2022-12-13 13:20:50,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 554 transitions. [2022-12-13 13:20:50,006 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 554 transitions. Word has length 176 [2022-12-13 13:20:50,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:20:50,006 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 554 transitions. [2022-12-13 13:20:50,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 10 states have internal predecessors, (97), 4 states have call successors, (11), 10 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-13 13:20:50,006 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 554 transitions. [2022-12-13 13:20:50,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-12-13 13:20:50,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:20:50,007 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:20:50,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-12-13 13:20:50,007 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:20:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:20:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2100552038, now seen corresponding path program 1 times [2022-12-13 13:20:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:20:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413433390] [2022-12-13 13:20:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:20:50,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:20:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:20:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:20:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:20:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:20:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:20:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:20:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-12-13 13:20:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-12-13 13:20:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:20:52,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:20:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-12-13 13:20:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-12-13 13:20:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:20:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2022-12-13 13:20:52,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:20:52,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413433390] [2022-12-13 13:20:52,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413433390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:20:52,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:20:52,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 13:20:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361113827] [2022-12-13 13:20:52,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:20:52,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 13:20:52,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:20:52,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 13:20:52,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-13 13:20:52,711 INFO L87 Difference]: Start difference. First operand 451 states and 554 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 13:20:54,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:20:56,938 WARN L539 Checker$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 13:20:59,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:21:01,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:21:03,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:21:05,175 WARN L539 Checker$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 13:21:07,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:21:09,187 WARN L539 Checker$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 13:21:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:21:13,814 INFO L93 Difference]: Finished difference Result 794 states and 1004 transitions. [2022-12-13 13:21:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:21:13,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 182 [2022-12-13 13:21:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:21:13,816 INFO L225 Difference]: With dead ends: 794 [2022-12-13 13:21:13,816 INFO L226 Difference]: Without dead ends: 489 [2022-12-13 13:21:13,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-12-13 13:21:13,817 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 328 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 76 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.5s IncrementalHoareTripleChecker+Time [2022-12-13 13:21:13,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 980 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1382 Invalid, 8 Unknown, 0 Unchecked, 20.5s Time] [2022-12-13 13:21:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-12-13 13:21:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 436. [2022-12-13 13:21:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 337 states have (on average 1.1543026706231454) internal successors, (389), 342 states have internal predecessors, (389), 66 states have call successors, (66), 33 states have call predecessors, (66), 32 states have return successors, (72), 61 states have call predecessors, (72), 63 states have call successors, (72) [2022-12-13 13:21:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 527 transitions. [2022-12-13 13:21:13,898 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 527 transitions. Word has length 182 [2022-12-13 13:21:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:21:13,898 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 527 transitions. [2022-12-13 13:21:13,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (12), 10 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 13:21:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 527 transitions. [2022-12-13 13:21:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-12-13 13:21:13,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:21:13,899 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:13,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-12-13 13:21:13,900 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:21:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:21:13,900 INFO L85 PathProgramCache]: Analyzing trace with hash 180386089, now seen corresponding path program 1 times [2022-12-13 13:21:13,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:21:13,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638629997] [2022-12-13 13:21:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:21:13,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 13:21:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-12-13 13:21:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-12-13 13:21:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 13:21:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 13:21:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:21:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:21:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-12-13 13:21:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-12-13 13:21:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:21:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:21:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2022-12-13 13:21:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-12-13 13:21:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-12-13 13:21:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 13:21:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-12-13 13:21:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-12-13 13:21:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2022-12-13 13:21:16,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 13:21:16,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638629997] [2022-12-13 13:21:16,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638629997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 13:21:16,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716974517] [2022-12-13 13:21:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:21:16,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 13:21:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:21:16,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 13:21:16,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 13:21:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:21:25,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 11488 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:21:25,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:21:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-12-13 13:21:26,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:21:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716974517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:21:26,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 13:21:26,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 18 [2022-12-13 13:21:26,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968680832] [2022-12-13 13:21:26,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:21:26,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:21:26,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 13:21:26,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:21:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-12-13 13:21:26,190 INFO L87 Difference]: Start difference. First operand 436 states and 527 transitions. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 13:21:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 13:21:26,515 INFO L93 Difference]: Finished difference Result 757 states and 929 transitions. [2022-12-13 13:21:26,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:21:26,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 217 [2022-12-13 13:21:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 13:21:26,516 INFO L225 Difference]: With dead ends: 757 [2022-12-13 13:21:26,517 INFO L226 Difference]: Without dead ends: 459 [2022-12-13 13:21:26,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-12-13 13:21:26,518 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 20 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 13:21:26,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1214 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 13:21:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-12-13 13:21:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 454. [2022-12-13 13:21:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 351 states have (on average 1.1481481481481481) internal successors, (403), 357 states have internal predecessors, (403), 68 states have call successors, (68), 33 states have call predecessors, (68), 34 states have return successors, (82), 64 states have call predecessors, (82), 65 states have call successors, (82) [2022-12-13 13:21:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 553 transitions. [2022-12-13 13:21:26,599 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 553 transitions. Word has length 217 [2022-12-13 13:21:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 13:21:26,600 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 553 transitions. [2022-12-13 13:21:26,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 13:21:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 553 transitions. [2022-12-13 13:21:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-12-13 13:21:26,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 13:21:26,601 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:21:26,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 13:21:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96bbfb66-f7f6-4b65-8884-e863a117212b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 13:21:26,802 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 13:21:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:21:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash 944203272, now seen corresponding path program 1 times [2022-12-13 13:21:26,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 13:21:26,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201838997] [2022-12-13 13:21:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:21:26,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms