./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ --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 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c --- 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-dbf71c6-m [2022-10-17 10:29:22,131 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:29:22,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:29:22,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:29:22,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:29:22,216 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:29:22,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:29:22,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:29:22,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:29:22,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:29:22,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:29:22,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:29:22,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:29:22,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:29:22,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:29:22,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:29:22,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:29:22,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:29:22,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:29:22,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:29:22,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:29:22,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:29:22,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:29:22,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:29:22,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:29:22,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:29:22,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:29:22,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:29:22,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:29:22,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:29:22,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:29:22,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:29:22,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:29:22,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:29:22,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:29:22,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:29:22,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:29:22,307 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:29:22,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:29:22,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:29:22,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:29:22,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:29:22,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:29:22,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:29:22,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:29:22,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:29:22,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:29:22,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:29:22,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:29:22,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:29:22,366 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:29:22,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:29:22,368 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:29:22,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:29:22,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:29:22,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:29:22,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:29:22,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:29:22,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:29:22,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:29:22,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:29:22,371 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:29:22,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:29:22,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:29:22,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:29:22,372 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:29:22,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:29:22,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:29:22,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:29:22,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:29:22,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:29:22,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:29:22,376 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:29:22,376 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:29:22,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:29:22,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48b194ce99c1fa112b5c4d4ed6cc0216b9fbb33f6f6efd57d62e9c27b1f7eb5c [2022-10-17 10:29:22,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:29:22,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:29:22,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:29:22,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:29:22,787 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:29:22,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2022-10-17 10:29:22,901 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/data/4e5e8cf94/ca66f77c4f3647b8a7a235acbdbd5e1d/FLAG6c2490818 [2022-10-17 10:29:23,498 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:29:23,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c [2022-10-17 10:29:23,520 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/data/4e5e8cf94/ca66f77c4f3647b8a7a235acbdbd5e1d/FLAG6c2490818 [2022-10-17 10:29:23,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/data/4e5e8cf94/ca66f77c4f3647b8a7a235acbdbd5e1d [2022-10-17 10:29:23,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:29:23,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:29:23,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:29:23,812 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:29:23,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:29:23,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:29:23" (1/1) ... [2022-10-17 10:29:23,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e70d459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:23, skipping insertion in model container [2022-10-17 10:29:23,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:29:23" (1/1) ... [2022-10-17 10:29:23,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:29:23,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:29:24,129 WARN L230 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_33f025bb-612f-4d15-a3c6-c145f8280b2c/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c[2072,2085] [2022-10-17 10:29:24,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:29:24,371 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:29:24,400 WARN L230 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_33f025bb-612f-4d15-a3c6-c145f8280b2c/sv-benchmarks/c/ntdrivers-simplified/diskperf_simpl1.cil.c[2072,2085] [2022-10-17 10:29:24,556 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:29:24,581 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:29:24,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24 WrapperNode [2022-10-17 10:29:24,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:29:24,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:29:24,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:29:24,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:29:24,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,618 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,683 INFO L138 Inliner]: procedures = 38, calls = 66, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 755 [2022-10-17 10:29:24,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:29:24,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:29:24,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:29:24,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:29:24,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,703 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,760 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:29:24,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:29:24,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:29:24,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:29:24,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (1/1) ... [2022-10-17 10:29:24,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:29:24,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:29:24,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:29:24,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_33f025bb-612f-4d15-a3c6-c145f8280b2c/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:29:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:29:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-10-17 10:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-10-17 10:29:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-10-17 10:29:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-10-17 10:29:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-10-17 10:29:24,922 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-10-17 10:29:24,922 INFO L130 BoogieDeclarations]: Found specification of procedure IoBuildDeviceIoControlRequest [2022-10-17 10:29:24,923 INFO L138 BoogieDeclarations]: Found implementation of procedure IoBuildDeviceIoControlRequest [2022-10-17 10:29:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfForwardIrpSynchronous [2022-10-17 10:29:24,924 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfForwardIrpSynchronous [2022-10-17 10:29:24,924 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-10-17 10:29:24,924 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-10-17 10:29:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:29:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-10-17 10:29:24,925 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-10-17 10:29:24,925 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIrpCompletion [2022-10-17 10:29:24,926 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIrpCompletion [2022-10-17 10:29:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure DiskPerfIoCompletion [2022-10-17 10:29:24,926 INFO L138 BoogieDeclarations]: Found implementation of procedure DiskPerfIoCompletion [2022-10-17 10:29:24,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:29:24,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:29:25,156 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:29:25,158 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:29:25,168 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 10:29:25,290 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-10-17 10:29:25,290 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-10-17 10:29:25,293 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 10:29:25,336 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-10-17 10:29:25,337 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-10-17 10:29:25,460 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 10:29:25,469 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 10:29:25,500 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 10:29:26,187 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##39: assume !false; [2022-10-17 10:29:26,188 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume false; [2022-10-17 10:29:26,188 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume false; [2022-10-17 10:29:26,188 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !false; [2022-10-17 10:29:26,188 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##106: assume !false; [2022-10-17 10:29:26,189 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##105: assume false; [2022-10-17 10:29:26,190 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 10:29:26,257 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2022-10-17 10:29:26,258 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2022-10-17 10:29:26,340 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:29:26,354 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:29:26,355 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:29:26,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:29:26 BoogieIcfgContainer [2022-10-17 10:29:26,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:29:26,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:29:26,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:29:26,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:29:26,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:29:23" (1/3) ... [2022-10-17 10:29:26,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc72400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:29:26, skipping insertion in model container [2022-10-17 10:29:26,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:29:24" (2/3) ... [2022-10-17 10:29:26,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc72400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:29:26, skipping insertion in model container [2022-10-17 10:29:26,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:29:26" (3/3) ... [2022-10-17 10:29:26,370 INFO L112 eAbstractionObserver]: Analyzing ICFG diskperf_simpl1.cil.c [2022-10-17 10:29:26,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:29:26,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:29:26,510 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:29:26,528 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;@d48756e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:29:26,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:29:26,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) [2022-10-17 10:29:26,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 10:29:26,558 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:26,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:26,560 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1911400740, now seen corresponding path program 1 times [2022-10-17 10:29:26,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:26,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127582402] [2022-10-17 10:29:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:26,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:26,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:26,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127582402] [2022-10-17 10:29:26,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127582402] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:26,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:26,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:26,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562190433] [2022-10-17 10:29:26,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:26,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:26,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:26,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:26,975 INFO L87 Difference]: Start difference. First operand has 243 states, 188 states have (on average 1.4680851063829787) internal successors, (276), 205 states have internal predecessors, (276), 44 states have call successors, (44), 9 states have call predecessors, (44), 9 states have return successors, (44), 40 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-10-17 10:29:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:27,266 INFO L93 Difference]: Finished difference Result 449 states and 690 transitions. [2022-10-17 10:29:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2022-10-17 10:29:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:27,285 INFO L225 Difference]: With dead ends: 449 [2022-10-17 10:29:27,286 INFO L226 Difference]: Without dead ends: 236 [2022-10-17 10:29:27,294 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 [2022-10-17 10:29:27,299 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 8 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:27,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 635 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:29:27,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-10-17 10:29:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-10-17 10:29:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 183 states have (on average 1.4098360655737705) internal successors, (258), 198 states have internal predecessors, (258), 44 states have call successors, (44), 9 states have call predecessors, (44), 8 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-10-17 10:29:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 332 transitions. [2022-10-17 10:29:27,387 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 332 transitions. Word has length 13 [2022-10-17 10:29:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:27,388 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 332 transitions. [2022-10-17 10:29:27,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-10-17 10:29:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 332 transitions. [2022-10-17 10:29:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 10:29:27,390 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:27,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:29:27,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1078790828, now seen corresponding path program 1 times [2022-10-17 10:29:27,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:27,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090182583] [2022-10-17 10:29:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:27,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:27,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:27,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090182583] [2022-10-17 10:29:27,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090182583] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:27,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:27,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:27,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660449570] [2022-10-17 10:29:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:27,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:27,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:27,562 INFO L87 Difference]: Start difference. First operand 236 states and 332 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-10-17 10:29:27,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:27,810 INFO L93 Difference]: Finished difference Result 536 states and 777 transitions. [2022-10-17 10:29:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:27,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-10-17 10:29:27,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:27,819 INFO L225 Difference]: With dead ends: 536 [2022-10-17 10:29:27,819 INFO L226 Difference]: Without dead ends: 377 [2022-10-17 10:29:27,821 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 [2022-10-17 10:29:27,824 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 250 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:27,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 680 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-10-17 10:29:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2022-10-17 10:29:27,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 283 states have (on average 1.3851590106007068) internal successors, (392), 291 states have internal predecessors, (392), 59 states have call successors, (59), 16 states have call predecessors, (59), 14 states have return successors, (67), 51 states have call predecessors, (67), 48 states have call successors, (67) [2022-10-17 10:29:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 518 transitions. [2022-10-17 10:29:27,898 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 518 transitions. Word has length 15 [2022-10-17 10:29:27,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:27,899 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 518 transitions. [2022-10-17 10:29:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-10-17 10:29:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 518 transitions. [2022-10-17 10:29:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:29:27,902 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:27,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:27,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:29:27,903 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash -320586800, now seen corresponding path program 1 times [2022-10-17 10:29:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:27,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76154535] [2022-10-17 10:29:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:27,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76154535] [2022-10-17 10:29:28,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76154535] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:28,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:28,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343027961] [2022-10-17 10:29:28,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:28,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:28,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:28,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:28,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:28,166 INFO L87 Difference]: Start difference. First operand 357 states and 518 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-10-17 10:29:28,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:28,232 INFO L93 Difference]: Finished difference Result 823 states and 1229 transitions. [2022-10-17 10:29:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:28,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 20 [2022-10-17 10:29:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:28,240 INFO L225 Difference]: With dead ends: 823 [2022-10-17 10:29:28,240 INFO L226 Difference]: Without dead ends: 550 [2022-10-17 10:29:28,243 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 [2022-10-17 10:29:28,244 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 255 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:28,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 578 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:29:28,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-10-17 10:29:28,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 519. [2022-10-17 10:29:28,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 411 states have (on average 1.389294403892944) internal successors, (571), 418 states have internal predecessors, (571), 84 states have call successors, (84), 24 states have call predecessors, (84), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2022-10-17 10:29:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 772 transitions. [2022-10-17 10:29:28,301 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 772 transitions. Word has length 20 [2022-10-17 10:29:28,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:28,302 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 772 transitions. [2022-10-17 10:29:28,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2022-10-17 10:29:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 772 transitions. [2022-10-17 10:29:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:29:28,304 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:28,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:28,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:29:28,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash -175921138, now seen corresponding path program 1 times [2022-10-17 10:29:28,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:28,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629891348] [2022-10-17 10:29:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:28,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:28,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:28,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629891348] [2022-10-17 10:29:28,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629891348] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:28,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:28,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:28,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206326553] [2022-10-17 10:29:28,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:28,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:28,400 INFO L87 Difference]: Start difference. First operand 519 states and 772 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-10-17 10:29:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:28,497 INFO L93 Difference]: Finished difference Result 534 states and 792 transitions. [2022-10-17 10:29:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 24 [2022-10-17 10:29:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:28,504 INFO L225 Difference]: With dead ends: 534 [2022-10-17 10:29:28,504 INFO L226 Difference]: Without dead ends: 530 [2022-10-17 10:29:28,505 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 [2022-10-17 10:29:28,506 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 21 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:28,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 557 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:29:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-10-17 10:29:28,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 529. [2022-10-17 10:29:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 422 states have (on average 1.386255924170616) internal successors, (585), 427 states have internal predecessors, (585), 83 states have call successors, (83), 25 states have call predecessors, (83), 23 states have return successors, (117), 77 states have call predecessors, (117), 74 states have call successors, (117) [2022-10-17 10:29:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 785 transitions. [2022-10-17 10:29:28,552 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 785 transitions. Word has length 24 [2022-10-17 10:29:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:28,552 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 785 transitions. [2022-10-17 10:29:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-10-17 10:29:28,553 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 785 transitions. [2022-10-17 10:29:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-10-17 10:29:28,555 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:28,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:28,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:29:28,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:28,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1035800982, now seen corresponding path program 1 times [2022-10-17 10:29:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:28,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108530438] [2022-10-17 10:29:28,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:28,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:29:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:28,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108530438] [2022-10-17 10:29:28,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108530438] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:28,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:28,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:29:28,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549464800] [2022-10-17 10:29:28,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:28,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:29:28,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:28,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:29:28,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:28,717 INFO L87 Difference]: Start difference. First operand 529 states and 785 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-10-17 10:29:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:29,239 INFO L93 Difference]: Finished difference Result 582 states and 861 transitions. [2022-10-17 10:29:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:29:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 27 [2022-10-17 10:29:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:29,246 INFO L225 Difference]: With dead ends: 582 [2022-10-17 10:29:29,246 INFO L226 Difference]: Without dead ends: 571 [2022-10-17 10:29:29,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:29,250 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 410 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 798 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:29,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 798 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:29:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-10-17 10:29:29,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2022-10-17 10:29:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.3803131991051454) internal successors, (617), 454 states have internal predecessors, (617), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2022-10-17 10:29:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 826 transitions. [2022-10-17 10:29:29,326 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 826 transitions. Word has length 27 [2022-10-17 10:29:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:29,327 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 826 transitions. [2022-10-17 10:29:29,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-10-17 10:29:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 826 transitions. [2022-10-17 10:29:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:29:29,331 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:29,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:29,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:29:29,332 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1813713707, now seen corresponding path program 1 times [2022-10-17 10:29:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:29,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009302235] [2022-10-17 10:29:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:29,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:29:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:29,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:29,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009302235] [2022-10-17 10:29:29,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009302235] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:29,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:29,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:29:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145687104] [2022-10-17 10:29:29,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:29:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:29:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:29,560 INFO L87 Difference]: Start difference. First operand 556 states and 826 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-10-17 10:29:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:30,051 INFO L93 Difference]: Finished difference Result 579 states and 854 transitions. [2022-10-17 10:29:30,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:29:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 28 [2022-10-17 10:29:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:30,058 INFO L225 Difference]: With dead ends: 579 [2022-10-17 10:29:30,058 INFO L226 Difference]: Without dead ends: 571 [2022-10-17 10:29:30,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:30,064 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 408 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:30,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 799 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:29:30,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-10-17 10:29:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 556. [2022-10-17 10:29:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 447 states have (on average 1.378076062639821) internal successors, (616), 454 states have internal predecessors, (616), 83 states have call successors, (83), 25 states have call predecessors, (83), 25 states have return successors, (126), 77 states have call predecessors, (126), 74 states have call successors, (126) [2022-10-17 10:29:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 825 transitions. [2022-10-17 10:29:30,169 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 825 transitions. Word has length 28 [2022-10-17 10:29:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:30,169 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 825 transitions. [2022-10-17 10:29:30,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-10-17 10:29:30,170 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 825 transitions. [2022-10-17 10:29:30,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:29:30,172 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:30,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:30,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:29:30,172 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:30,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:30,173 INFO L85 PathProgramCache]: Analyzing trace with hash 123360193, now seen corresponding path program 1 times [2022-10-17 10:29:30,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:30,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136047763] [2022-10-17 10:29:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:30,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:30,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:29:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:30,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:30,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136047763] [2022-10-17 10:29:30,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136047763] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:30,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:30,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:30,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830545659] [2022-10-17 10:29:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:30,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:30,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:30,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:30,228 INFO L87 Difference]: Start difference. First operand 556 states and 825 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-10-17 10:29:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:30,587 INFO L93 Difference]: Finished difference Result 1018 states and 1542 transitions. [2022-10-17 10:29:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:29:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-10-17 10:29:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:30,598 INFO L225 Difference]: With dead ends: 1018 [2022-10-17 10:29:30,598 INFO L226 Difference]: Without dead ends: 989 [2022-10-17 10:29:30,599 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 [2022-10-17 10:29:30,601 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 417 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:30,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 772 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-10-17 10:29:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 949. [2022-10-17 10:29:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 759 states have (on average 1.391304347826087) internal successors, (1056), 766 states have internal predecessors, (1056), 141 states have call successors, (141), 47 states have call predecessors, (141), 48 states have return successors, (249), 137 states have call predecessors, (249), 132 states have call successors, (249) [2022-10-17 10:29:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1446 transitions. [2022-10-17 10:29:30,734 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1446 transitions. Word has length 29 [2022-10-17 10:29:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:30,737 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1446 transitions. [2022-10-17 10:29:30,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-10-17 10:29:30,737 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1446 transitions. [2022-10-17 10:29:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 10:29:30,741 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:30,742 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:30,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:29:30,742 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:30,744 INFO L85 PathProgramCache]: Analyzing trace with hash -462412845, now seen corresponding path program 1 times [2022-10-17 10:29:30,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:30,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666274070] [2022-10-17 10:29:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:30,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:30,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-10-17 10:29:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:30,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:30,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666274070] [2022-10-17 10:29:30,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666274070] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:30,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:30,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236744318] [2022-10-17 10:29:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:30,831 INFO L87 Difference]: Start difference. First operand 949 states and 1446 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-10-17 10:29:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:31,140 INFO L93 Difference]: Finished difference Result 985 states and 1494 transitions. [2022-10-17 10:29:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:29:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 30 [2022-10-17 10:29:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:31,151 INFO L225 Difference]: With dead ends: 985 [2022-10-17 10:29:31,152 INFO L226 Difference]: Without dead ends: 966 [2022-10-17 10:29:31,153 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 [2022-10-17 10:29:31,154 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 84 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:31,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 998 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-10-17 10:29:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 945. [2022-10-17 10:29:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 756 states have (on average 1.3915343915343916) internal successors, (1052), 763 states have internal predecessors, (1052), 140 states have call successors, (140), 47 states have call predecessors, (140), 48 states have return successors, (248), 136 states have call predecessors, (248), 131 states have call successors, (248) [2022-10-17 10:29:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1440 transitions. [2022-10-17 10:29:31,263 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1440 transitions. Word has length 30 [2022-10-17 10:29:31,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:31,264 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1440 transitions. [2022-10-17 10:29:31,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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) [2022-10-17 10:29:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1440 transitions. [2022-10-17 10:29:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:29:31,265 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:31,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:31,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-17 10:29:31,266 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:31,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:31,266 INFO L85 PathProgramCache]: Analyzing trace with hash 415913558, now seen corresponding path program 1 times [2022-10-17 10:29:31,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:31,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256530860] [2022-10-17 10:29:31,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:31,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:31,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:31,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256530860] [2022-10-17 10:29:31,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256530860] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:31,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:31,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:31,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483919406] [2022-10-17 10:29:31,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:31,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:31,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:31,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:31,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:31,328 INFO L87 Difference]: Start difference. First operand 945 states and 1440 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:31,418 INFO L93 Difference]: Finished difference Result 1334 states and 2062 transitions. [2022-10-17 10:29:31,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:31,419 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-10-17 10:29:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:31,424 INFO L225 Difference]: With dead ends: 1334 [2022-10-17 10:29:31,425 INFO L226 Difference]: Without dead ends: 510 [2022-10-17 10:29:31,430 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 [2022-10-17 10:29:31,433 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 264 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:31,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 270 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:29:31,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-10-17 10:29:31,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 510. [2022-10-17 10:29:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 408 states have (on average 1.3553921568627452) internal successors, (553), 414 states have internal predecessors, (553), 78 states have call successors, (78), 23 states have call predecessors, (78), 23 states have return successors, (123), 73 states have call predecessors, (123), 71 states have call successors, (123) [2022-10-17 10:29:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 754 transitions. [2022-10-17 10:29:31,502 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 754 transitions. Word has length 34 [2022-10-17 10:29:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:31,503 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 754 transitions. [2022-10-17 10:29:31,503 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 754 transitions. [2022-10-17 10:29:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:29:31,504 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:31,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:31,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 10:29:31,505 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:31,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:31,506 INFO L85 PathProgramCache]: Analyzing trace with hash -2105808494, now seen corresponding path program 1 times [2022-10-17 10:29:31,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:31,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043424129] [2022-10-17 10:29:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:31,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:31,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:29:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:31,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:31,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043424129] [2022-10-17 10:29:31,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043424129] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:31,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:31,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:29:31,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342390662] [2022-10-17 10:29:31,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:29:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:29:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:31,616 INFO L87 Difference]: Start difference. First operand 510 states and 754 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-10-17 10:29:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:31,892 INFO L93 Difference]: Finished difference Result 553 states and 805 transitions. [2022-10-17 10:29:31,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:29:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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 34 [2022-10-17 10:29:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:31,899 INFO L225 Difference]: With dead ends: 553 [2022-10-17 10:29:31,900 INFO L226 Difference]: Without dead ends: 519 [2022-10-17 10:29:31,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:31,906 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 94 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:31,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1167 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-10-17 10:29:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2022-10-17 10:29:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 407 states have (on average 1.3513513513513513) internal successors, (550), 413 states have internal predecessors, (550), 77 states have call successors, (77), 23 states have call predecessors, (77), 23 states have return successors, (122), 72 states have call predecessors, (122), 70 states have call successors, (122) [2022-10-17 10:29:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 749 transitions. [2022-10-17 10:29:31,961 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 749 transitions. Word has length 34 [2022-10-17 10:29:31,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:31,962 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 749 transitions. [2022-10-17 10:29:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 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) [2022-10-17 10:29:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 749 transitions. [2022-10-17 10:29:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:29:31,965 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:31,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:31,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:29:31,965 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:31,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:31,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1486754927, now seen corresponding path program 1 times [2022-10-17 10:29:31,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:31,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444846413] [2022-10-17 10:29:31,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:31,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:29:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:32,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:32,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444846413] [2022-10-17 10:29:32,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444846413] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:32,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:32,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:32,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328523995] [2022-10-17 10:29:32,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:32,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:32,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:32,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:32,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:32,049 INFO L87 Difference]: Start difference. First operand 508 states and 749 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-10-17 10:29:32,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:32,464 INFO L93 Difference]: Finished difference Result 720 states and 1102 transitions. [2022-10-17 10:29:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:29:32,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-10-17 10:29:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:32,473 INFO L225 Difference]: With dead ends: 720 [2022-10-17 10:29:32,473 INFO L226 Difference]: Without dead ends: 712 [2022-10-17 10:29:32,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:32,475 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 232 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:32,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 668 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:29:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-10-17 10:29:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 566. [2022-10-17 10:29:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 455 states have (on average 1.3516483516483517) internal successors, (615), 461 states have internal predecessors, (615), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2022-10-17 10:29:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 841 transitions. [2022-10-17 10:29:32,545 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 841 transitions. Word has length 34 [2022-10-17 10:29:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:32,545 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 841 transitions. [2022-10-17 10:29:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-10-17 10:29:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 841 transitions. [2022-10-17 10:29:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:29:32,547 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:32,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:32,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:29:32,548 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1608594996, now seen corresponding path program 1 times [2022-10-17 10:29:32,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:32,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745749913] [2022-10-17 10:29:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:32,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:29:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:32,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:32,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745749913] [2022-10-17 10:29:32,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745749913] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:32,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:32,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:29:32,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517471516] [2022-10-17 10:29:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:29:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:29:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:29:32,721 INFO L87 Difference]: Start difference. First operand 566 states and 841 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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) [2022-10-17 10:29:33,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:33,197 INFO L93 Difference]: Finished difference Result 583 states and 860 transitions. [2022-10-17 10:29:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:29:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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 35 [2022-10-17 10:29:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:33,203 INFO L225 Difference]: With dead ends: 583 [2022-10-17 10:29:33,203 INFO L226 Difference]: Without dead ends: 579 [2022-10-17 10:29:33,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:33,206 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 66 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:33,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1471 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:29:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-10-17 10:29:33,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 574. [2022-10-17 10:29:33,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 463 states have (on average 1.349892008639309) internal successors, (625), 469 states have internal predecessors, (625), 84 states have call successors, (84), 25 states have call predecessors, (84), 26 states have return successors, (142), 80 states have call predecessors, (142), 77 states have call successors, (142) [2022-10-17 10:29:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 851 transitions. [2022-10-17 10:29:33,274 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 851 transitions. Word has length 35 [2022-10-17 10:29:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:33,274 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 851 transitions. [2022-10-17 10:29:33,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 6 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) [2022-10-17 10:29:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 851 transitions. [2022-10-17 10:29:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:29:33,276 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:33,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:33,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:29:33,276 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:33,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1608318166, now seen corresponding path program 1 times [2022-10-17 10:29:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:33,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544737352] [2022-10-17 10:29:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:33,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:33,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:29:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:33,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:33,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544737352] [2022-10-17 10:29:33,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544737352] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:33,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:33,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:29:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864447060] [2022-10-17 10:29:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:29:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:29:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:33,454 INFO L87 Difference]: Start difference. First operand 574 states and 851 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) [2022-10-17 10:29:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:34,204 INFO L93 Difference]: Finished difference Result 726 states and 1107 transitions. [2022-10-17 10:29:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:34,205 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 35 [2022-10-17 10:29:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:34,212 INFO L225 Difference]: With dead ends: 726 [2022-10-17 10:29:34,213 INFO L226 Difference]: Without dead ends: 709 [2022-10-17 10:29:34,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:29:34,214 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 694 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:34,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 758 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:29:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-10-17 10:29:34,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 565. [2022-10-17 10:29:34,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 455 states have (on average 1.3494505494505495) internal successors, (614), 461 states have internal predecessors, (614), 83 states have call successors, (83), 25 states have call predecessors, (83), 26 states have return successors, (141), 79 states have call predecessors, (141), 76 states have call successors, (141) [2022-10-17 10:29:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 838 transitions. [2022-10-17 10:29:34,300 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 838 transitions. Word has length 35 [2022-10-17 10:29:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:34,300 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 838 transitions. [2022-10-17 10:29:34,301 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) [2022-10-17 10:29:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 838 transitions. [2022-10-17 10:29:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:29:34,302 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:34,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:34,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:29:34,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1299938960, now seen corresponding path program 1 times [2022-10-17 10:29:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:34,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531918767] [2022-10-17 10:29:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531918767] [2022-10-17 10:29:34,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531918767] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:34,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:34,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:34,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191308345] [2022-10-17 10:29:34,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:34,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:34,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:34,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:34,399 INFO L87 Difference]: Start difference. First operand 565 states and 838 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-10-17 10:29:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:34,608 INFO L93 Difference]: Finished difference Result 584 states and 856 transitions. [2022-10-17 10:29:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:29:34,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 34 [2022-10-17 10:29:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:34,614 INFO L225 Difference]: With dead ends: 584 [2022-10-17 10:29:34,615 INFO L226 Difference]: Without dead ends: 561 [2022-10-17 10:29:34,616 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 [2022-10-17 10:29:34,617 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 266 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:34,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 404 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:29:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-10-17 10:29:34,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 559. [2022-10-17 10:29:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 449 states have (on average 1.3496659242761693) internal successors, (606), 456 states have internal predecessors, (606), 83 states have call successors, (83), 25 states have call predecessors, (83), 26 states have return successors, (140), 78 states have call predecessors, (140), 76 states have call successors, (140) [2022-10-17 10:29:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 829 transitions. [2022-10-17 10:29:34,690 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 829 transitions. Word has length 34 [2022-10-17 10:29:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:34,690 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 829 transitions. [2022-10-17 10:29:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2022-10-17 10:29:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 829 transitions. [2022-10-17 10:29:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:29:34,692 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:34,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:34,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:29:34,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1995419648, now seen corresponding path program 1 times [2022-10-17 10:29:34,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:34,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315522574] [2022-10-17 10:29:34,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:34,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:34,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:29:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:34,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:34,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315522574] [2022-10-17 10:29:34,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315522574] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:34,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:34,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410143279] [2022-10-17 10:29:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:34,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:34,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:34,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:34,766 INFO L87 Difference]: Start difference. First operand 559 states and 829 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:29:35,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:35,116 INFO L93 Difference]: Finished difference Result 621 states and 890 transitions. [2022-10-17 10:29:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:29:35,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-10-17 10:29:35,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:35,120 INFO L225 Difference]: With dead ends: 621 [2022-10-17 10:29:35,120 INFO L226 Difference]: Without dead ends: 371 [2022-10-17 10:29:35,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:29:35,123 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 315 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:35,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 650 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:29:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-10-17 10:29:35,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 353. [2022-10-17 10:29:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 289 states have (on average 1.2975778546712802) internal successors, (375), 296 states have internal predecessors, (375), 47 states have call successors, (47), 17 states have call predecessors, (47), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2022-10-17 10:29:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 483 transitions. [2022-10-17 10:29:35,173 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 483 transitions. Word has length 38 [2022-10-17 10:29:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:35,173 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 483 transitions. [2022-10-17 10:29:35,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:29:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 483 transitions. [2022-10-17 10:29:35,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:29:35,175 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:35,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:35,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:29:35,175 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:35,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1922765712, now seen corresponding path program 1 times [2022-10-17 10:29:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:35,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249583699] [2022-10-17 10:29:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:35,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:35,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:35,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249583699] [2022-10-17 10:29:35,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249583699] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:35,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:35,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:29:35,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536175830] [2022-10-17 10:29:35,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:29:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:29:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:29:35,216 INFO L87 Difference]: Start difference. First operand 353 states and 483 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-10-17 10:29:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:35,373 INFO L93 Difference]: Finished difference Result 495 states and 696 transitions. [2022-10-17 10:29:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:29:35,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 35 [2022-10-17 10:29:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:35,378 INFO L225 Difference]: With dead ends: 495 [2022-10-17 10:29:35,378 INFO L226 Difference]: Without dead ends: 482 [2022-10-17 10:29:35,379 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 [2022-10-17 10:29:35,380 INFO L413 NwaCegarLoop]: 417 mSDtfsCounter, 161 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:35,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 638 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:29:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-10-17 10:29:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 369. [2022-10-17 10:29:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 304 states have (on average 1.2861842105263157) internal successors, (391), 311 states have internal predecessors, (391), 47 states have call successors, (47), 17 states have call predecessors, (47), 17 states have return successors, (62), 41 states have call predecessors, (62), 40 states have call successors, (62) [2022-10-17 10:29:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 500 transitions. [2022-10-17 10:29:35,436 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 500 transitions. Word has length 35 [2022-10-17 10:29:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:35,437 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 500 transitions. [2022-10-17 10:29:35,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-10-17 10:29:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 500 transitions. [2022-10-17 10:29:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:29:35,438 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:35,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:35,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:29:35,439 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1798212464, now seen corresponding path program 1 times [2022-10-17 10:29:35,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:35,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706032118] [2022-10-17 10:29:35,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:35,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:35,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706032118] [2022-10-17 10:29:35,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706032118] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:35,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:35,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625744743] [2022-10-17 10:29:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:35,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:35,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:35,550 INFO L87 Difference]: Start difference. First operand 369 states and 500 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-10-17 10:29:35,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:35,745 INFO L93 Difference]: Finished difference Result 381 states and 512 transitions. [2022-10-17 10:29:35,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:29:35,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 35 [2022-10-17 10:29:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:35,749 INFO L225 Difference]: With dead ends: 381 [2022-10-17 10:29:35,749 INFO L226 Difference]: Without dead ends: 348 [2022-10-17 10:29:35,750 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 [2022-10-17 10:29:35,750 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 262 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:35,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 411 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:29:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-10-17 10:29:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-10-17 10:29:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 285 states have (on average 1.2771929824561403) internal successors, (364), 291 states have internal predecessors, (364), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (61), 40 states have call predecessors, (61), 40 states have call successors, (61) [2022-10-17 10:29:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 471 transitions. [2022-10-17 10:29:35,806 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 471 transitions. Word has length 35 [2022-10-17 10:29:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:35,806 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 471 transitions. [2022-10-17 10:29:35,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2022-10-17 10:29:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 471 transitions. [2022-10-17 10:29:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:29:35,808 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:35,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:35,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-10-17 10:29:35,808 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:35,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1722219638, now seen corresponding path program 1 times [2022-10-17 10:29:35,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:35,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971131168] [2022-10-17 10:29:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:35,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:35,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:35,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:29:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971131168] [2022-10-17 10:29:35,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971131168] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:35,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:35,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:29:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987915065] [2022-10-17 10:29:35,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:35,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:29:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:29:35,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:29:35,929 INFO L87 Difference]: Start difference. First operand 348 states and 471 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 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) [2022-10-17 10:29:36,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:36,329 INFO L93 Difference]: Finished difference Result 352 states and 474 transitions. [2022-10-17 10:29:36,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:29:36,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 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 37 [2022-10-17 10:29:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:36,332 INFO L225 Difference]: With dead ends: 352 [2022-10-17 10:29:36,332 INFO L226 Difference]: Without dead ends: 321 [2022-10-17 10:29:36,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:36,334 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 60 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:36,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1424 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:29:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-10-17 10:29:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2022-10-17 10:29:36,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 260 states have (on average 1.2846153846153847) internal successors, (334), 266 states have internal predecessors, (334), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2022-10-17 10:29:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 439 transitions. [2022-10-17 10:29:36,385 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 439 transitions. Word has length 37 [2022-10-17 10:29:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:36,385 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 439 transitions. [2022-10-17 10:29:36,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 6 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) [2022-10-17 10:29:36,386 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 439 transitions. [2022-10-17 10:29:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:29:36,386 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:36,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:36,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:29:36,387 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash -70447595, now seen corresponding path program 1 times [2022-10-17 10:29:36,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:36,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110357290] [2022-10-17 10:29:36,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:36,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:36,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:36,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110357290] [2022-10-17 10:29:36,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110357290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:36,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:36,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:29:36,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252427975] [2022-10-17 10:29:36,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:36,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:29:36,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:36,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:29:36,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:29:36,564 INFO L87 Difference]: Start difference. First operand 321 states and 439 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2022-10-17 10:29:36,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:36,708 INFO L93 Difference]: Finished difference Result 342 states and 461 transitions. [2022-10-17 10:29:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:29:36,709 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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 36 [2022-10-17 10:29:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:36,712 INFO L225 Difference]: With dead ends: 342 [2022-10-17 10:29:36,712 INFO L226 Difference]: Without dead ends: 320 [2022-10-17 10:29:36,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:36,714 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 57 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:36,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1193 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:29:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-10-17 10:29:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-10-17 10:29:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 259 states have (on average 1.281853281853282) internal successors, (332), 265 states have internal predecessors, (332), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (60), 39 states have call predecessors, (60), 39 states have call successors, (60) [2022-10-17 10:29:36,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 437 transitions. [2022-10-17 10:29:36,769 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 437 transitions. Word has length 36 [2022-10-17 10:29:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:36,770 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 437 transitions. [2022-10-17 10:29:36,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 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) [2022-10-17 10:29:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 437 transitions. [2022-10-17 10:29:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:29:36,771 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:36,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:36,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-17 10:29:36,772 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:36,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2018897985, now seen corresponding path program 1 times [2022-10-17 10:29:36,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:36,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280776544] [2022-10-17 10:29:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:36,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:36,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-10-17 10:29:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280776544] [2022-10-17 10:29:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280776544] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:36,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:36,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:29:36,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849747797] [2022-10-17 10:29:36,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:29:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:29:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:36,884 INFO L87 Difference]: Start difference. First operand 320 states and 437 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2022-10-17 10:29:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:37,133 INFO L93 Difference]: Finished difference Result 346 states and 469 transitions. [2022-10-17 10:29:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:29:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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 38 [2022-10-17 10:29:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:37,137 INFO L225 Difference]: With dead ends: 346 [2022-10-17 10:29:37,137 INFO L226 Difference]: Without dead ends: 316 [2022-10-17 10:29:37,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:29:37,139 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 79 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:37,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1067 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:37,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-10-17 10:29:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2022-10-17 10:29:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 246 states have (on average 1.2886178861788617) internal successors, (317), 252 states have internal predecessors, (317), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2022-10-17 10:29:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 420 transitions. [2022-10-17 10:29:37,196 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 420 transitions. Word has length 38 [2022-10-17 10:29:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:37,197 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 420 transitions. [2022-10-17 10:29:37,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 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) [2022-10-17 10:29:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 420 transitions. [2022-10-17 10:29:37,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:29:37,198 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:37,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:37,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-10-17 10:29:37,199 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:37,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:37,199 INFO L85 PathProgramCache]: Analyzing trace with hash 233678808, now seen corresponding path program 1 times [2022-10-17 10:29:37,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:37,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056225175] [2022-10-17 10:29:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:37,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056225175] [2022-10-17 10:29:37,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056225175] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:37,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:37,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:29:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812152841] [2022-10-17 10:29:37,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:29:37,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:29:37,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:37,359 INFO L87 Difference]: Start difference. First operand 305 states and 420 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:37,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:37,507 INFO L93 Difference]: Finished difference Result 320 states and 436 transitions. [2022-10-17 10:29:37,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:29:37,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-17 10:29:37,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:37,513 INFO L225 Difference]: With dead ends: 320 [2022-10-17 10:29:37,513 INFO L226 Difference]: Without dead ends: 316 [2022-10-17 10:29:37,514 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 [2022-10-17 10:29:37,514 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 46 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:37,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1090 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:29:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-10-17 10:29:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2022-10-17 10:29:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 253 states have (on average 1.284584980237154) internal successors, (325), 259 states have internal predecessors, (325), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2022-10-17 10:29:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 428 transitions. [2022-10-17 10:29:37,567 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 428 transitions. Word has length 37 [2022-10-17 10:29:37,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:37,568 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 428 transitions. [2022-10-17 10:29:37,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 428 transitions. [2022-10-17 10:29:37,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:29:37,569 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:37,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:37,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-10-17 10:29:37,570 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:37,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 233401978, now seen corresponding path program 1 times [2022-10-17 10:29:37,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:37,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139719888] [2022-10-17 10:29:37,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:37,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:37,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:37,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139719888] [2022-10-17 10:29:37,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139719888] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:37,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:37,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:29:37,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589888236] [2022-10-17 10:29:37,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:37,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:29:37,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:37,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:29:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:29:37,680 INFO L87 Difference]: Start difference. First operand 312 states and 428 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:38,005 INFO L93 Difference]: Finished difference Result 425 states and 608 transitions. [2022-10-17 10:29:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:29:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-10-17 10:29:38,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:38,010 INFO L225 Difference]: With dead ends: 425 [2022-10-17 10:29:38,010 INFO L226 Difference]: Without dead ends: 396 [2022-10-17 10:29:38,010 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 [2022-10-17 10:29:38,012 INFO L413 NwaCegarLoop]: 359 mSDtfsCounter, 345 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:38,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 501 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-10-17 10:29:38,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 289. [2022-10-17 10:29:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 236 states have internal predecessors, (298), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2022-10-17 10:29:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 401 transitions. [2022-10-17 10:29:38,067 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 401 transitions. Word has length 37 [2022-10-17 10:29:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:38,068 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 401 transitions. [2022-10-17 10:29:38,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:29:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 401 transitions. [2022-10-17 10:29:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 10:29:38,069 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:38,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:38,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-10-17 10:29:38,070 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:38,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:38,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1150124824, now seen corresponding path program 1 times [2022-10-17 10:29:38,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:38,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797819016] [2022-10-17 10:29:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:38,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:38,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-10-17 10:29:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:38,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-10-17 10:29:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:38,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797819016] [2022-10-17 10:29:38,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797819016] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:38,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:38,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:38,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222454358] [2022-10-17 10:29:38,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:38,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:38,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:38,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:38,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:38,165 INFO L87 Difference]: Start difference. First operand 289 states and 401 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:38,422 INFO L93 Difference]: Finished difference Result 535 states and 772 transitions. [2022-10-17 10:29:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:29:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-10-17 10:29:38,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:38,426 INFO L225 Difference]: With dead ends: 535 [2022-10-17 10:29:38,426 INFO L226 Difference]: Without dead ends: 304 [2022-10-17 10:29:38,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:29:38,429 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 112 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:38,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 635 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-10-17 10:29:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 297. [2022-10-17 10:29:38,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 238 states have (on average 1.2983193277310925) internal successors, (309), 243 states have internal predecessors, (309), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2022-10-17 10:29:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 412 transitions. [2022-10-17 10:29:38,497 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 412 transitions. Word has length 43 [2022-10-17 10:29:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:38,497 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 412 transitions. [2022-10-17 10:29:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 412 transitions. [2022-10-17 10:29:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 10:29:38,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:38,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:38,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-10-17 10:29:38,499 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:38,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1967801604, now seen corresponding path program 1 times [2022-10-17 10:29:38,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:38,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87924540] [2022-10-17 10:29:38,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:38,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:38,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:29:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:38,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:38,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87924540] [2022-10-17 10:29:38,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87924540] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:38,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:38,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:29:38,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565592043] [2022-10-17 10:29:38,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:38,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:38,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:38,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:38,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:38,821 INFO L87 Difference]: Start difference. First operand 297 states and 412 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 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) [2022-10-17 10:29:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:39,319 INFO L93 Difference]: Finished difference Result 570 states and 820 transitions. [2022-10-17 10:29:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:29:39,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 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 43 [2022-10-17 10:29:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:39,322 INFO L225 Difference]: With dead ends: 570 [2022-10-17 10:29:39,323 INFO L226 Difference]: Without dead ends: 310 [2022-10-17 10:29:39,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:29:39,326 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 77 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:39,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 1275 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:29:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-10-17 10:29:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 301. [2022-10-17 10:29:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 242 states have (on average 1.3016528925619835) internal successors, (315), 247 states have internal predecessors, (315), 44 states have call successors, (44), 15 states have call predecessors, (44), 14 states have return successors, (59), 38 states have call predecessors, (59), 38 states have call successors, (59) [2022-10-17 10:29:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 418 transitions. [2022-10-17 10:29:39,387 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 418 transitions. Word has length 43 [2022-10-17 10:29:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:39,388 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 418 transitions. [2022-10-17 10:29:39,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 8 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) [2022-10-17 10:29:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 418 transitions. [2022-10-17 10:29:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 10:29:39,389 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:39,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:39,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-10-17 10:29:39,390 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:39,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1751625849, now seen corresponding path program 1 times [2022-10-17 10:29:39,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172861638] [2022-10-17 10:29:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:29:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:39,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:39,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172861638] [2022-10-17 10:29:39,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172861638] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:39,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:39,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:29:39,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144438275] [2022-10-17 10:29:39,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:39,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:29:39,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:39,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:29:39,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:29:39,557 INFO L87 Difference]: Start difference. First operand 301 states and 418 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:39,896 INFO L93 Difference]: Finished difference Result 569 states and 825 transitions. [2022-10-17 10:29:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:29:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-10-17 10:29:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:39,900 INFO L225 Difference]: With dead ends: 569 [2022-10-17 10:29:39,901 INFO L226 Difference]: Without dead ends: 326 [2022-10-17 10:29:39,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:39,903 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 94 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:39,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1030 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-10-17 10:29:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 313. [2022-10-17 10:29:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 252 states have (on average 1.2936507936507937) internal successors, (326), 257 states have internal predecessors, (326), 44 states have call successors, (44), 15 states have call predecessors, (44), 16 states have return successors, (77), 40 states have call predecessors, (77), 38 states have call successors, (77) [2022-10-17 10:29:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 447 transitions. [2022-10-17 10:29:39,963 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 447 transitions. Word has length 47 [2022-10-17 10:29:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 447 transitions. [2022-10-17 10:29:39,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:39,964 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 447 transitions. [2022-10-17 10:29:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:29:39,965 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:39,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:39,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-10-17 10:29:39,965 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:39,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1018197871, now seen corresponding path program 1 times [2022-10-17 10:29:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:39,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130183299] [2022-10-17 10:29:39,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:40,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-17 10:29:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:40,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:40,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130183299] [2022-10-17 10:29:40,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130183299] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:40,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:40,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:29:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099531005] [2022-10-17 10:29:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:40,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:29:40,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:40,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:29:40,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:40,157 INFO L87 Difference]: Start difference. First operand 313 states and 447 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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) [2022-10-17 10:29:40,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:40,588 INFO L93 Difference]: Finished difference Result 315 states and 448 transitions. [2022-10-17 10:29:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:40,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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 [2022-10-17 10:29:40,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:40,591 INFO L225 Difference]: With dead ends: 315 [2022-10-17 10:29:40,592 INFO L226 Difference]: Without dead ends: 282 [2022-10-17 10:29:40,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:29:40,593 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 66 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:40,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1244 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:29:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-10-17 10:29:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-10-17 10:29:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 224 states have (on average 1.3169642857142858) internal successors, (295), 228 states have internal predecessors, (295), 42 states have call successors, (42), 14 states have call predecessors, (42), 15 states have return successors, (76), 39 states have call predecessors, (76), 37 states have call successors, (76) [2022-10-17 10:29:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 413 transitions. [2022-10-17 10:29:40,649 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 413 transitions. Word has length 44 [2022-10-17 10:29:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:40,649 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 413 transitions. [2022-10-17 10:29:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 7 states have internal predecessors, (41), 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) [2022-10-17 10:29:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 413 transitions. [2022-10-17 10:29:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:29:40,650 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:40,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:40,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-10-17 10:29:40,651 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash 496853054, now seen corresponding path program 1 times [2022-10-17 10:29:40,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:40,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426150006] [2022-10-17 10:29:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:40,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:40,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:29:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:40,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:40,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426150006] [2022-10-17 10:29:40,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426150006] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:40,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:40,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208767813] [2022-10-17 10:29:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:40,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:40,722 INFO L87 Difference]: Start difference. First operand 282 states and 413 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:40,987 INFO L93 Difference]: Finished difference Result 441 states and 673 transitions. [2022-10-17 10:29:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:29:40,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-10-17 10:29:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:40,993 INFO L225 Difference]: With dead ends: 441 [2022-10-17 10:29:40,993 INFO L226 Difference]: Without dead ends: 438 [2022-10-17 10:29:40,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:29:40,995 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 166 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:40,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 631 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-10-17 10:29:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 286. [2022-10-17 10:29:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 228 states have (on average 1.3201754385964912) internal successors, (301), 232 states have internal predecessors, (301), 42 states have call successors, (42), 14 states have call predecessors, (42), 15 states have return successors, (76), 39 states have call predecessors, (76), 37 states have call successors, (76) [2022-10-17 10:29:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 419 transitions. [2022-10-17 10:29:41,054 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 419 transitions. Word has length 48 [2022-10-17 10:29:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:41,055 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 419 transitions. [2022-10-17 10:29:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 419 transitions. [2022-10-17 10:29:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-17 10:29:41,056 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:41,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-10-17 10:29:41,057 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:41,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:41,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2015471348, now seen corresponding path program 1 times [2022-10-17 10:29:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287176823] [2022-10-17 10:29:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:29:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:41,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:41,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287176823] [2022-10-17 10:29:41,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287176823] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:41,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:41,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:29:41,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405651021] [2022-10-17 10:29:41,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:41,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:29:41,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:41,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:29:41,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:29:41,178 INFO L87 Difference]: Start difference. First operand 286 states and 419 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:41,456 INFO L93 Difference]: Finished difference Result 658 states and 979 transitions. [2022-10-17 10:29:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:29:41,457 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-10-17 10:29:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:41,461 INFO L225 Difference]: With dead ends: 658 [2022-10-17 10:29:41,461 INFO L226 Difference]: Without dead ends: 405 [2022-10-17 10:29:41,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:29:41,464 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 262 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:41,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 446 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-10-17 10:29:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 373. [2022-10-17 10:29:41,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 297 states have (on average 1.2996632996632997) internal successors, (386), 302 states have internal predecessors, (386), 53 states have call successors, (53), 18 states have call predecessors, (53), 22 states have return successors, (96), 52 states have call predecessors, (96), 49 states have call successors, (96) [2022-10-17 10:29:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 535 transitions. [2022-10-17 10:29:41,531 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 535 transitions. Word has length 49 [2022-10-17 10:29:41,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:41,532 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 535 transitions. [2022-10-17 10:29:41,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:29:41,532 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 535 transitions. [2022-10-17 10:29:41,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 10:29:41,533 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:41,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:41,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-10-17 10:29:41,534 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:41,534 INFO L85 PathProgramCache]: Analyzing trace with hash -726473774, now seen corresponding path program 1 times [2022-10-17 10:29:41,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938186808] [2022-10-17 10:29:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:41,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:41,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938186808] [2022-10-17 10:29:41,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938186808] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:41,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:41,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:29:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094759406] [2022-10-17 10:29:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:41,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:29:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:29:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:41,877 INFO L87 Difference]: Start difference. First operand 373 states and 535 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:29:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:42,199 INFO L93 Difference]: Finished difference Result 691 states and 1016 transitions. [2022-10-17 10:29:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:29:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-10-17 10:29:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:42,204 INFO L225 Difference]: With dead ends: 691 [2022-10-17 10:29:42,204 INFO L226 Difference]: Without dead ends: 346 [2022-10-17 10:29:42,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:42,207 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 89 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:42,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 884 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-10-17 10:29:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-10-17 10:29:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 271 states have (on average 1.2767527675276753) internal successors, (346), 275 states have internal predecessors, (346), 52 states have call successors, (52), 18 states have call predecessors, (52), 22 states have return successors, (96), 52 states have call predecessors, (96), 49 states have call successors, (96) [2022-10-17 10:29:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 494 transitions. [2022-10-17 10:29:42,277 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 494 transitions. Word has length 50 [2022-10-17 10:29:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:42,277 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 494 transitions. [2022-10-17 10:29:42,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-17 10:29:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 494 transitions. [2022-10-17 10:29:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-10-17 10:29:42,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:42,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:42,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-10-17 10:29:42,279 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1339562411, now seen corresponding path program 1 times [2022-10-17 10:29:42,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:42,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135238927] [2022-10-17 10:29:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:42,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:42,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:42,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:42,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:42,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:42,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135238927] [2022-10-17 10:29:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135238927] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:42,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:42,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:29:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997714576] [2022-10-17 10:29:42,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:42,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:42,508 INFO L87 Difference]: Start difference. First operand 346 states and 494 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:29:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:43,020 INFO L93 Difference]: Finished difference Result 659 states and 959 transitions. [2022-10-17 10:29:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:29:43,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-10-17 10:29:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:43,024 INFO L225 Difference]: With dead ends: 659 [2022-10-17 10:29:43,024 INFO L226 Difference]: Without dead ends: 341 [2022-10-17 10:29:43,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:29:43,028 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 239 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:43,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 740 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:29:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-10-17 10:29:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2022-10-17 10:29:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 267 states have (on average 1.2659176029962547) internal successors, (338), 271 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2022-10-17 10:29:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 481 transitions. [2022-10-17 10:29:43,113 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 481 transitions. Word has length 54 [2022-10-17 10:29:43,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:43,113 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 481 transitions. [2022-10-17 10:29:43,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:29:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 481 transitions. [2022-10-17 10:29:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-17 10:29:43,115 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:43,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:43,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-10-17 10:29:43,116 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash 330640549, now seen corresponding path program 1 times [2022-10-17 10:29:43,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:43,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924816973] [2022-10-17 10:29:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:43,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:43,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:43,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924816973] [2022-10-17 10:29:43,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924816973] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:43,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:43,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:29:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29269786] [2022-10-17 10:29:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:43,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:29:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:43,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:29:43,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:29:43,259 INFO L87 Difference]: Start difference. First operand 341 states and 481 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:29:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:43,533 INFO L93 Difference]: Finished difference Result 666 states and 963 transitions. [2022-10-17 10:29:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:29:43,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-10-17 10:29:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:43,537 INFO L225 Difference]: With dead ends: 666 [2022-10-17 10:29:43,537 INFO L226 Difference]: Without dead ends: 353 [2022-10-17 10:29:43,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:29:43,540 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 112 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:43,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 593 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:29:43,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-10-17 10:29:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 344. [2022-10-17 10:29:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.262962962962963) internal successors, (341), 274 states have internal predecessors, (341), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2022-10-17 10:29:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 484 transitions. [2022-10-17 10:29:43,623 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 484 transitions. Word has length 57 [2022-10-17 10:29:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:43,624 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 484 transitions. [2022-10-17 10:29:43,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:29:43,624 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 484 transitions. [2022-10-17 10:29:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-10-17 10:29:43,625 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:43,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:43,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-10-17 10:29:43,625 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash 942519397, now seen corresponding path program 1 times [2022-10-17 10:29:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:43,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2989897] [2022-10-17 10:29:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:43,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:43,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:43,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2989897] [2022-10-17 10:29:43,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2989897] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:43,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:43,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:29:43,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683814344] [2022-10-17 10:29:43,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:43,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:29:43,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:43,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:29:43,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:29:43,899 INFO L87 Difference]: Start difference. First operand 344 states and 484 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:29:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:44,263 INFO L93 Difference]: Finished difference Result 662 states and 947 transitions. [2022-10-17 10:29:44,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:29:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-10-17 10:29:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:44,267 INFO L225 Difference]: With dead ends: 662 [2022-10-17 10:29:44,268 INFO L226 Difference]: Without dead ends: 347 [2022-10-17 10:29:44,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:29:44,271 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 73 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:44,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 1082 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:29:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-10-17 10:29:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-10-17 10:29:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 270 states have (on average 1.2518518518518518) internal successors, (338), 274 states have internal predecessors, (338), 52 states have call successors, (52), 18 states have call predecessors, (52), 21 states have return successors, (91), 51 states have call predecessors, (91), 49 states have call successors, (91) [2022-10-17 10:29:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 481 transitions. [2022-10-17 10:29:44,354 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 481 transitions. Word has length 57 [2022-10-17 10:29:44,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:44,354 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 481 transitions. [2022-10-17 10:29:44,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:29:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 481 transitions. [2022-10-17 10:29:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-17 10:29:44,356 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:44,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:44,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-10-17 10:29:44,357 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:44,357 INFO L85 PathProgramCache]: Analyzing trace with hash -146309345, now seen corresponding path program 1 times [2022-10-17 10:29:44,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:44,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522637863] [2022-10-17 10:29:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:44,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:44,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-10-17 10:29:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:44,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:44,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522637863] [2022-10-17 10:29:44,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522637863] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:44,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:44,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:29:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811357468] [2022-10-17 10:29:44,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:44,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:29:44,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:44,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:29:44,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:29:44,567 INFO L87 Difference]: Start difference. First operand 344 states and 481 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:29:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:45,103 INFO L93 Difference]: Finished difference Result 623 states and 870 transitions. [2022-10-17 10:29:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:29:45,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2022-10-17 10:29:45,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:45,108 INFO L225 Difference]: With dead ends: 623 [2022-10-17 10:29:45,108 INFO L226 Difference]: Without dead ends: 322 [2022-10-17 10:29:45,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:29:45,111 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 165 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:45,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1228 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:29:45,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-10-17 10:29:45,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 314. [2022-10-17 10:29:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 246 states have (on average 1.2560975609756098) internal successors, (309), 252 states have internal predecessors, (309), 49 states have call successors, (49), 18 states have call predecessors, (49), 18 states have return successors, (70), 43 states have call predecessors, (70), 46 states have call successors, (70) [2022-10-17 10:29:45,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 428 transitions. [2022-10-17 10:29:45,178 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 428 transitions. Word has length 68 [2022-10-17 10:29:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:45,178 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 428 transitions. [2022-10-17 10:29:45,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 5 states have internal predecessors, (56), 3 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:29:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 428 transitions. [2022-10-17 10:29:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-10-17 10:29:45,180 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:45,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:45,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-10-17 10:29:45,180 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:45,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1989043251, now seen corresponding path program 1 times [2022-10-17 10:29:45,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:45,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696866658] [2022-10-17 10:29:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:45,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:45,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:45,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:45,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:45,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:29:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:45,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:45,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:45,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696866658] [2022-10-17 10:29:45,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696866658] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:45,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:45,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-10-17 10:29:45,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051075984] [2022-10-17 10:29:45,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:45,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:29:45,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:45,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:29:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:29:45,528 INFO L87 Difference]: Start difference. First operand 314 states and 428 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:29:46,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:46,153 INFO L93 Difference]: Finished difference Result 350 states and 477 transitions. [2022-10-17 10:29:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:29:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2022-10-17 10:29:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:46,174 INFO L225 Difference]: With dead ends: 350 [2022-10-17 10:29:46,174 INFO L226 Difference]: Without dead ends: 329 [2022-10-17 10:29:46,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:29:46,176 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 119 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:46,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 2152 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:29:46,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-10-17 10:29:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 317. [2022-10-17 10:29:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 248 states have (on average 1.2540322580645162) internal successors, (311), 255 states have internal predecessors, (311), 49 states have call successors, (49), 18 states have call predecessors, (49), 19 states have return successors, (71), 43 states have call predecessors, (71), 46 states have call successors, (71) [2022-10-17 10:29:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2022-10-17 10:29:46,270 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 73 [2022-10-17 10:29:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:46,270 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2022-10-17 10:29:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 11 states have internal predecessors, (62), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:29:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2022-10-17 10:29:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 10:29:46,272 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:46,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-10-17 10:29:46,273 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:46,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash -182846632, now seen corresponding path program 1 times [2022-10-17 10:29:46,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376074864] [2022-10-17 10:29:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:46,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:46,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:29:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:46,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:46,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:46,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-10-17 10:29:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:46,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:46,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376074864] [2022-10-17 10:29:46,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376074864] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:46,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:46,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-10-17 10:29:46,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489091324] [2022-10-17 10:29:46,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:46,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:29:46,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:29:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:29:46,688 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:29:47,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:29:47,490 INFO L93 Difference]: Finished difference Result 354 states and 481 transitions. [2022-10-17 10:29:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:29:47,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2022-10-17 10:29:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:29:47,493 INFO L225 Difference]: With dead ends: 354 [2022-10-17 10:29:47,493 INFO L226 Difference]: Without dead ends: 333 [2022-10-17 10:29:47,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:29:47,496 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 106 mSDsluCounter, 2267 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:29:47,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 2476 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:29:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-10-17 10:29:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 317. [2022-10-17 10:29:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 248 states have (on average 1.2540322580645162) internal successors, (311), 255 states have internal predecessors, (311), 49 states have call successors, (49), 18 states have call predecessors, (49), 19 states have return successors, (71), 43 states have call predecessors, (71), 46 states have call successors, (71) [2022-10-17 10:29:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 431 transitions. [2022-10-17 10:29:47,566 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 431 transitions. Word has length 74 [2022-10-17 10:29:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:29:47,566 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 431 transitions. [2022-10-17 10:29:47,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 11 states have internal predecessors, (63), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:29:47,567 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 431 transitions. [2022-10-17 10:29:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-10-17 10:29:47,571 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:29:47,572 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:29:47,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-10-17 10:29:47,572 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:29:47,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:29:47,573 INFO L85 PathProgramCache]: Analyzing trace with hash -673237615, now seen corresponding path program 1 times [2022-10-17 10:29:47,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:29:47,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211612968] [2022-10-17 10:29:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:29:47,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:29:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:29:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:47,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-10-17 10:29:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-17 10:29:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:47,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-10-17 10:29:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:48,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:29:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:48,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-10-17 10:29:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:29:48,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:29:48,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:29:48,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211612968] [2022-10-17 10:29:48,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211612968] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:29:48,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:29:48,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-10-17 10:29:48,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754029375] [2022-10-17 10:29:48,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:29:48,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:29:48,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:29:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:29:48,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:29:48,028 INFO L87 Difference]: Start difference. First operand 317 states and 431 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 11 states have internal predecessors, (69), 3 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6)