./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a --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 aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 --- 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-b5237d8 [2022-11-21 16:36:59,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:36:59,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:36:59,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:36:59,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:36:59,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:36:59,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:36:59,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:36:59,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:36:59,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:36:59,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:36:59,232 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:36:59,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:36:59,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:36:59,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:36:59,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:36:59,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:36:59,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:36:59,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:36:59,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:36:59,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:36:59,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:36:59,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:36:59,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:36:59,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:36:59,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:36:59,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:36:59,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:36:59,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:36:59,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:36:59,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:36:59,282 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:36:59,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:36:59,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:36:59,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:36:59,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:36:59,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:36:59,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:36:59,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:36:59,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:36:59,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:36:59,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 16:36:59,322 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:36:59,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:36:59,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:36:59,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:36:59,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:36:59,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:36:59,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:36:59,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:36:59,325 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:36:59,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:36:59,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:36:59,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:36:59,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:36:59,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:36:59,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:36:59,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:36:59,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:36:59,327 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:36:59,328 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:36:59,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:36:59,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:36:59,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:36:59,328 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:36:59,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:36:59,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:36:59,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:36:59,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:36:59,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:36:59,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:36:59,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:36:59,330 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:36:59,330 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:36:59,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:36:59,331 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_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aec1fafbe63132c51323898caadb7f7b777fc751b19e58e74eab1930ebd68833 [2022-11-21 16:36:59,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:36:59,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:36:59,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:36:59,676 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:36:59,677 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:36:59,678 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/eca-rers2018/Problem10.c [2022-11-21 16:37:02,938 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:37:03,303 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:37:03,310 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/sv-benchmarks/c/eca-rers2018/Problem10.c [2022-11-21 16:37:03,339 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/data/353f066a8/bc42670ec02d407da8c2ad12f407b55b/FLAGe1c9ee964 [2022-11-21 16:37:03,364 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/data/353f066a8/bc42670ec02d407da8c2ad12f407b55b [2022-11-21 16:37:03,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:37:03,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:37:03,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:37:03,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:37:03,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:37:03,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:37:03" (1/1) ... [2022-11-21 16:37:03,384 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4d6bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:03, skipping insertion in model container [2022-11-21 16:37:03,384 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:37:03" (1/1) ... [2022-11-21 16:37:03,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:37:03,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:37:03,668 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2022-11-21 16:37:03,674 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2022-11-21 16:37:04,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:37:04,325 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:37:04,339 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/sv-benchmarks/c/eca-rers2018/Problem10.c[778,791] [2022-11-21 16:37:04,340 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/sv-benchmarks/c/eca-rers2018/Problem10.c[817,830] [2022-11-21 16:37:04,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:37:04,531 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:37:04,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04 WrapperNode [2022-11-21 16:37:04,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:37:04,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:37:04,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:37:04,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:37:04,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,635 INFO L138 Inliner]: procedures = 274, calls = 248, calls flagged for inlining = 144, calls inlined = 144, statements flattened = 865 [2022-11-21 16:37:04,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:37:04,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:37:04,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:37:04,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:37:04,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,716 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:37:04,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:37:04,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:37:04,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:37:04,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (1/1) ... [2022-11-21 16:37:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:37:04,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:37:04,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:37:04,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91d0f166-f2d8-45b1-ac91-a28089afc09e/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:37:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:37:04,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-21 16:37:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-21 16:37:04,827 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-21 16:37:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-21 16:37:04,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:37:04,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:37:04,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:37:04,977 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:37:05,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:37:06,232 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:37:06,254 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:37:06,254 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-21 16:37:06,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:37:06 BoogieIcfgContainer [2022-11-21 16:37:06,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:37:06,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:37:06,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:37:06,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:37:06,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:37:03" (1/3) ... [2022-11-21 16:37:06,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3c1c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:37:06, skipping insertion in model container [2022-11-21 16:37:06,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:37:04" (2/3) ... [2022-11-21 16:37:06,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3c1c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:37:06, skipping insertion in model container [2022-11-21 16:37:06,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:37:06" (3/3) ... [2022-11-21 16:37:06,271 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem10.c [2022-11-21 16:37:06,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:37:06,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 16:37:06,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:37:06,355 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;@6067d699, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:37:06,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-21 16:37:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-21 16:37:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-21 16:37:06,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:06,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:06,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1184212657, now seen corresponding path program 1 times [2022-11-21 16:37:06,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:06,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007561708] [2022-11-21 16:37:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:06,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:06,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:06,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007561708] [2022-11-21 16:37:06,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007561708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:06,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:06,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:06,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701622411] [2022-11-21 16:37:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:06,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:37:06,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:06,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:37:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:37:06,839 INFO L87 Difference]: Start difference. First operand has 468 states, 363 states have (on average 1.5922865013774106) internal successors, (578), 365 states have internal predecessors, (578), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.0) 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) [2022-11-21 16:37:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:08,386 INFO L93 Difference]: Finished difference Result 1165 states and 2069 transitions. [2022-11-21 16:37:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:37:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 [2022-11-21 16:37:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:08,410 INFO L225 Difference]: With dead ends: 1165 [2022-11-21 16:37:08,410 INFO L226 Difference]: Without dead ends: 690 [2022-11-21 16:37:08,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:37:08,427 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 395 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 772 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:08,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 772 Invalid, 1338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1106 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-21 16:37:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-11-21 16:37:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 557. [2022-11-21 16:37:08,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 455 states have (on average 1.589010989010989) internal successors, (723), 554 states have internal predecessors, (723), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 823 transitions. [2022-11-21 16:37:08,505 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 823 transitions. Word has length 13 [2022-11-21 16:37:08,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:08,505 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 823 transitions. [2022-11-21 16:37:08,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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) [2022-11-21 16:37:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 823 transitions. [2022-11-21 16:37:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-21 16:37:08,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:08,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:08,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:37:08,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash -249172658, now seen corresponding path program 1 times [2022-11-21 16:37:08,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252562924] [2022-11-21 16:37:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:08,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:08,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:08,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252562924] [2022-11-21 16:37:08,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252562924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:08,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:08,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692900911] [2022-11-21 16:37:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:37:08,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:37:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:37:08,613 INFO L87 Difference]: Start difference. First operand 557 states and 823 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:09,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:09,514 INFO L93 Difference]: Finished difference Result 1704 states and 2582 transitions. [2022-11-21 16:37:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:37:09,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-21 16:37:09,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:09,525 INFO L225 Difference]: With dead ends: 1704 [2022-11-21 16:37:09,525 INFO L226 Difference]: Without dead ends: 1149 [2022-11-21 16:37:09,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:37:09,528 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 866 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:09,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1116 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 16:37:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-21 16:37:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 888. [2022-11-21 16:37:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5521628498727735) internal successors, (1220), 885 states have internal predecessors, (1220), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1320 transitions. [2022-11-21 16:37:09,583 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1320 transitions. Word has length 21 [2022-11-21 16:37:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:09,584 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1320 transitions. [2022-11-21 16:37:09,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1320 transitions. [2022-11-21 16:37:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:37:09,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:09,586 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] [2022-11-21 16:37:09,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:37:09,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:09,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:09,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1086962958, now seen corresponding path program 1 times [2022-11-21 16:37:09,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:09,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106402744] [2022-11-21 16:37:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:09,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:09,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:09,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106402744] [2022-11-21 16:37:09,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106402744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:09,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:09,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:09,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605529307] [2022-11-21 16:37:09,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:09,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:09,829 INFO L87 Difference]: Start difference. First operand 888 states and 1320 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) [2022-11-21 16:37:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:09,884 INFO L93 Difference]: Finished difference Result 2645 states and 3935 transitions. [2022-11-21 16:37:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:09,885 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 [2022-11-21 16:37:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:09,891 INFO L225 Difference]: With dead ends: 2645 [2022-11-21 16:37:09,891 INFO L226 Difference]: Without dead ends: 1759 [2022-11-21 16:37:09,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:09,901 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 461 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:09,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1255 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:37:09,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-11-21 16:37:09,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 888. [2022-11-21 16:37:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 786 states have (on average 1.5508905852417303) internal successors, (1219), 885 states have internal predecessors, (1219), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1319 transitions. [2022-11-21 16:37:09,940 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1319 transitions. Word has length 24 [2022-11-21 16:37:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:09,940 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1319 transitions. [2022-11-21 16:37:09,941 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) [2022-11-21 16:37:09,941 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1319 transitions. [2022-11-21 16:37:09,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:37:09,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:09,948 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] [2022-11-21 16:37:09,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 16:37:09,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:09,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:09,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1345128396, now seen corresponding path program 1 times [2022-11-21 16:37:09,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:09,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740136341] [2022-11-21 16:37:09,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:09,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:10,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:10,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740136341] [2022-11-21 16:37:10,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740136341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:10,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:10,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:10,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891683136] [2022-11-21 16:37:10,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:10,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:10,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:10,028 INFO L87 Difference]: Start difference. First operand 888 states and 1319 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) [2022-11-21 16:37:10,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:10,239 INFO L93 Difference]: Finished difference Result 2201 states and 3265 transitions. [2022-11-21 16:37:10,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:10,239 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 [2022-11-21 16:37:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:10,244 INFO L225 Difference]: With dead ends: 2201 [2022-11-21 16:37:10,244 INFO L226 Difference]: Without dead ends: 1315 [2022-11-21 16:37:10,248 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 [2022-11-21 16:37:10,257 INFO L413 NwaCegarLoop]: 941 mSDtfsCounter, 533 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:10,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1382 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:37:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-11-21 16:37:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1231. [2022-11-21 16:37:10,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1129 states have (on average 1.5491585473870682) internal successors, (1749), 1228 states have internal predecessors, (1749), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 1849 transitions. [2022-11-21 16:37:10,330 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 1849 transitions. Word has length 24 [2022-11-21 16:37:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:10,331 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 1849 transitions. [2022-11-21 16:37:10,331 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) [2022-11-21 16:37:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 1849 transitions. [2022-11-21 16:37:10,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:37:10,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:10,333 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] [2022-11-21 16:37:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:37:10,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:10,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:10,336 INFO L85 PathProgramCache]: Analyzing trace with hash 500156944, now seen corresponding path program 1 times [2022-11-21 16:37:10,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:10,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615986792] [2022-11-21 16:37:10,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:10,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:10,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615986792] [2022-11-21 16:37:10,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615986792] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:10,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:10,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:10,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685344212] [2022-11-21 16:37:10,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:10,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:10,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:10,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:10,411 INFO L87 Difference]: Start difference. First operand 1231 states and 1849 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) [2022-11-21 16:37:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:11,024 INFO L93 Difference]: Finished difference Result 3169 states and 4832 transitions. [2022-11-21 16:37:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:11,024 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 [2022-11-21 16:37:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:11,032 INFO L225 Difference]: With dead ends: 3169 [2022-11-21 16:37:11,032 INFO L226 Difference]: Without dead ends: 1940 [2022-11-21 16:37:11,035 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 [2022-11-21 16:37:11,035 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 310 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:11,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 801 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:37:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2022-11-21 16:37:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1397. [2022-11-21 16:37:11,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1295 states have (on average 1.4517374517374517) internal successors, (1880), 1394 states have internal predecessors, (1880), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 1980 transitions. [2022-11-21 16:37:11,086 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 1980 transitions. Word has length 24 [2022-11-21 16:37:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:11,087 INFO L495 AbstractCegarLoop]: Abstraction has 1397 states and 1980 transitions. [2022-11-21 16:37:11,087 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) [2022-11-21 16:37:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 1980 transitions. [2022-11-21 16:37:11,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 16:37:11,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:11,094 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] [2022-11-21 16:37:11,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:37:11,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:11,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:11,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1201221522, now seen corresponding path program 1 times [2022-11-21 16:37:11,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:11,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609965317] [2022-11-21 16:37:11,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:11,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:11,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609965317] [2022-11-21 16:37:11,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609965317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:11,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:11,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:37:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005232374] [2022-11-21 16:37:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:11,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:11,177 INFO L87 Difference]: Start difference. First operand 1397 states and 1980 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2022-11-21 16:37:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:11,335 INFO L93 Difference]: Finished difference Result 4140 states and 5880 transitions. [2022-11-21 16:37:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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 [2022-11-21 16:37:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:11,345 INFO L225 Difference]: With dead ends: 4140 [2022-11-21 16:37:11,345 INFO L226 Difference]: Without dead ends: 2745 [2022-11-21 16:37:11,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:11,351 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 510 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:11,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1073 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:37:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-21 16:37:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2657. [2022-11-21 16:37:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2555 states have (on average 1.4348336594911937) internal successors, (3666), 2654 states have internal predecessors, (3666), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 3766 transitions. [2022-11-21 16:37:11,427 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 3766 transitions. Word has length 24 [2022-11-21 16:37:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:11,428 INFO L495 AbstractCegarLoop]: Abstraction has 2657 states and 3766 transitions. [2022-11-21 16:37:11,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 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) [2022-11-21 16:37:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 3766 transitions. [2022-11-21 16:37:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:37:11,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:11,429 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] [2022-11-21 16:37:11,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:37:11,429 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:11,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1417555436, now seen corresponding path program 1 times [2022-11-21 16:37:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:11,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735647198] [2022-11-21 16:37:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:11,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:11,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735647198] [2022-11-21 16:37:11,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735647198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:11,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:11,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:11,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494437231] [2022-11-21 16:37:11,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:11,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:11,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:11,495 INFO L87 Difference]: Start difference. First operand 2657 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-21 16:37:12,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:12,151 INFO L93 Difference]: Finished difference Result 6143 states and 8908 transitions. [2022-11-21 16:37:12,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:12,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 25 [2022-11-21 16:37:12,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:12,164 INFO L225 Difference]: With dead ends: 6143 [2022-11-21 16:37:12,164 INFO L226 Difference]: Without dead ends: 3488 [2022-11-21 16:37:12,168 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 [2022-11-21 16:37:12,169 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 230 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:12,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 722 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:37:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2022-11-21 16:37:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3484. [2022-11-21 16:37:12,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3484 states, 3382 states have (on average 1.3746303962152573) internal successors, (4649), 3481 states have internal predecessors, (4649), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:12,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3484 states to 3484 states and 4749 transitions. [2022-11-21 16:37:12,287 INFO L78 Accepts]: Start accepts. Automaton has 3484 states and 4749 transitions. Word has length 25 [2022-11-21 16:37:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:12,289 INFO L495 AbstractCegarLoop]: Abstraction has 3484 states and 4749 transitions. [2022-11-21 16:37:12,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-21 16:37:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3484 states and 4749 transitions. [2022-11-21 16:37:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 16:37:12,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:12,291 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] [2022-11-21 16:37:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 16:37:12,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash 2032440408, now seen corresponding path program 1 times [2022-11-21 16:37:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:12,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411483228] [2022-11-21 16:37:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:12,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:12,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411483228] [2022-11-21 16:37:12,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411483228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:12,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:12,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81896651] [2022-11-21 16:37:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:12,338 INFO L87 Difference]: Start difference. First operand 3484 states and 4749 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-21 16:37:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:13,024 INFO L93 Difference]: Finished difference Result 7813 states and 10890 transitions. [2022-11-21 16:37:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:13,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 25 [2022-11-21 16:37:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:13,040 INFO L225 Difference]: With dead ends: 7813 [2022-11-21 16:37:13,041 INFO L226 Difference]: Without dead ends: 4331 [2022-11-21 16:37:13,048 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 [2022-11-21 16:37:13,049 INFO L413 NwaCegarLoop]: 518 mSDtfsCounter, 299 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:13,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 682 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:37:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2022-11-21 16:37:13,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 4327. [2022-11-21 16:37:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4327 states, 4225 states have (on average 1.353846153846154) internal successors, (5720), 4324 states have internal predecessors, (5720), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4327 states to 4327 states and 5820 transitions. [2022-11-21 16:37:13,183 INFO L78 Accepts]: Start accepts. Automaton has 4327 states and 5820 transitions. Word has length 25 [2022-11-21 16:37:13,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:13,184 INFO L495 AbstractCegarLoop]: Abstraction has 4327 states and 5820 transitions. [2022-11-21 16:37:13,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-11-21 16:37:13,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4327 states and 5820 transitions. [2022-11-21 16:37:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:37:13,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:13,187 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] [2022-11-21 16:37:13,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:37:13,187 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash -995255721, now seen corresponding path program 1 times [2022-11-21 16:37:13,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:13,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690476132] [2022-11-21 16:37:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:13,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:13,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690476132] [2022-11-21 16:37:13,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690476132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:13,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:13,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:13,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220144713] [2022-11-21 16:37:13,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:13,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:13,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:13,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:13,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:13,233 INFO L87 Difference]: Start difference. First operand 4327 states and 5820 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-11-21 16:37:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:13,339 INFO L93 Difference]: Finished difference Result 8549 states and 11509 transitions. [2022-11-21 16:37:13,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:13,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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 26 [2022-11-21 16:37:13,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:13,389 INFO L225 Difference]: With dead ends: 8549 [2022-11-21 16:37:13,390 INFO L226 Difference]: Without dead ends: 8542 [2022-11-21 16:37:13,393 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 [2022-11-21 16:37:13,395 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 548 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:13,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1555 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:37:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8542 states. [2022-11-21 16:37:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8542 to 8441. [2022-11-21 16:37:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8441 states, 8339 states have (on average 1.3492025422712555) internal successors, (11251), 8438 states have internal predecessors, (11251), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8441 states to 8441 states and 11351 transitions. [2022-11-21 16:37:13,662 INFO L78 Accepts]: Start accepts. Automaton has 8441 states and 11351 transitions. Word has length 26 [2022-11-21 16:37:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:13,663 INFO L495 AbstractCegarLoop]: Abstraction has 8441 states and 11351 transitions. [2022-11-21 16:37:13,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-11-21 16:37:13,663 INFO L276 IsEmpty]: Start isEmpty. Operand 8441 states and 11351 transitions. [2022-11-21 16:37:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-21 16:37:13,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:13,664 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] [2022-11-21 16:37:13,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:37:13,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:13,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1419566957, now seen corresponding path program 1 times [2022-11-21 16:37:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:13,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603331949] [2022-11-21 16:37:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:13,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:13,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:13,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603331949] [2022-11-21 16:37:13,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603331949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:13,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:13,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:37:13,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692597876] [2022-11-21 16:37:13,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:13,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:13,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:13,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:13,731 INFO L87 Difference]: Start difference. First operand 8441 states and 11351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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) [2022-11-21 16:37:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:13,881 INFO L93 Difference]: Finished difference Result 16979 states and 22797 transitions. [2022-11-21 16:37:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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 26 [2022-11-21 16:37:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:13,901 INFO L225 Difference]: With dead ends: 16979 [2022-11-21 16:37:13,902 INFO L226 Difference]: Without dead ends: 8540 [2022-11-21 16:37:13,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:13,912 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 533 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:13,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1209 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:37:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8540 states. [2022-11-21 16:37:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8540 to 8439. [2022-11-21 16:37:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8439 states, 8339 states have (on average 1.3441659671423432) internal successors, (11209), 8436 states have internal predecessors, (11209), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8439 states to 8439 states and 11307 transitions. [2022-11-21 16:37:14,191 INFO L78 Accepts]: Start accepts. Automaton has 8439 states and 11307 transitions. Word has length 26 [2022-11-21 16:37:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:14,193 INFO L495 AbstractCegarLoop]: Abstraction has 8439 states and 11307 transitions. [2022-11-21 16:37:14,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 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) [2022-11-21 16:37:14,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8439 states and 11307 transitions. [2022-11-21 16:37:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 16:37:14,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:14,196 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] [2022-11-21 16:37:14,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:37:14,197 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:14,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1314457887, now seen corresponding path program 1 times [2022-11-21 16:37:14,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:14,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109322655] [2022-11-21 16:37:14,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:14,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:14,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:14,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109322655] [2022-11-21 16:37:14,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109322655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:14,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:14,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:37:14,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59476761] [2022-11-21 16:37:14,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:14,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:14,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:14,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:14,263 INFO L87 Difference]: Start difference. First operand 8439 states and 11307 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:14,477 INFO L93 Difference]: Finished difference Result 25142 states and 33722 transitions. [2022-11-21 16:37:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:14,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-21 16:37:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:14,515 INFO L225 Difference]: With dead ends: 25142 [2022-11-21 16:37:14,515 INFO L226 Difference]: Without dead ends: 16705 [2022-11-21 16:37:14,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:14,529 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 526 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:14,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:37:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16705 states. [2022-11-21 16:37:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16705 to 16607. [2022-11-21 16:37:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16607 states, 16507 states have (on average 1.3390076937057007) internal successors, (22103), 16604 states have internal predecessors, (22103), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16607 states to 16607 states and 22201 transitions. [2022-11-21 16:37:15,002 INFO L78 Accepts]: Start accepts. Automaton has 16607 states and 22201 transitions. Word has length 28 [2022-11-21 16:37:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:15,002 INFO L495 AbstractCegarLoop]: Abstraction has 16607 states and 22201 transitions. [2022-11-21 16:37:15,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 2 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 16607 states and 22201 transitions. [2022-11-21 16:37:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 16:37:15,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:15,003 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] [2022-11-21 16:37:15,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 16:37:15,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1594983404, now seen corresponding path program 1 times [2022-11-21 16:37:15,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:15,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077754577] [2022-11-21 16:37:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:15,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:15,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077754577] [2022-11-21 16:37:15,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077754577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:15,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:15,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377473959] [2022-11-21 16:37:15,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:15,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:15,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:15,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:15,066 INFO L87 Difference]: Start difference. First operand 16607 states and 22201 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-21 16:37:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:15,547 INFO L93 Difference]: Finished difference Result 48238 states and 64732 transitions. [2022-11-21 16:37:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-11-21 16:37:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:15,605 INFO L225 Difference]: With dead ends: 48238 [2022-11-21 16:37:15,606 INFO L226 Difference]: Without dead ends: 31633 [2022-11-21 16:37:15,617 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 [2022-11-21 16:37:15,618 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 504 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:15,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 1352 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:37:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31633 states. [2022-11-21 16:37:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31633 to 31544. [2022-11-21 16:37:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31544 states, 31444 states have (on average 1.3317644065640504) internal successors, (41876), 31541 states have internal predecessors, (41876), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:16,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31544 states to 31544 states and 41974 transitions. [2022-11-21 16:37:16,359 INFO L78 Accepts]: Start accepts. Automaton has 31544 states and 41974 transitions. Word has length 33 [2022-11-21 16:37:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:16,359 INFO L495 AbstractCegarLoop]: Abstraction has 31544 states and 41974 transitions. [2022-11-21 16:37:16,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-21 16:37:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 31544 states and 41974 transitions. [2022-11-21 16:37:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-21 16:37:16,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:16,361 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] [2022-11-21 16:37:16,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:37:16,361 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 132362279, now seen corresponding path program 1 times [2022-11-21 16:37:16,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377086748] [2022-11-21 16:37:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:16,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:16,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377086748] [2022-11-21 16:37:16,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377086748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:16,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:16,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:16,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635709256] [2022-11-21 16:37:16,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:16,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:16,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:16,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:16,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:16,399 INFO L87 Difference]: Start difference. First operand 31544 states and 41974 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2022-11-21 16:37:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:17,373 INFO L93 Difference]: Finished difference Result 73175 states and 97409 transitions. [2022-11-21 16:37:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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 [2022-11-21 16:37:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:17,626 INFO L225 Difference]: With dead ends: 73175 [2022-11-21 16:37:17,626 INFO L226 Difference]: Without dead ends: 41633 [2022-11-21 16:37:17,653 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 [2022-11-21 16:37:17,654 INFO L413 NwaCegarLoop]: 519 mSDtfsCounter, 483 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:17,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 965 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:37:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41633 states. [2022-11-21 16:37:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41633 to 41551. [2022-11-21 16:37:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41551 states, 41451 states have (on average 1.3153603049383609) internal successors, (54523), 41548 states have internal predecessors, (54523), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41551 states to 41551 states and 54621 transitions. [2022-11-21 16:37:18,578 INFO L78 Accepts]: Start accepts. Automaton has 41551 states and 54621 transitions. Word has length 34 [2022-11-21 16:37:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:18,580 INFO L495 AbstractCegarLoop]: Abstraction has 41551 states and 54621 transitions. [2022-11-21 16:37:18,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 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) [2022-11-21 16:37:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 41551 states and 54621 transitions. [2022-11-21 16:37:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:37:18,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:18,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:18,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-21 16:37:18,581 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -209128006, now seen corresponding path program 1 times [2022-11-21 16:37:18,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:18,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639221253] [2022-11-21 16:37:18,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:18,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:18,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639221253] [2022-11-21 16:37:18,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639221253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:18,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:18,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150464012] [2022-11-21 16:37:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:18,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:18,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:18,652 INFO L87 Difference]: Start difference. First operand 41551 states and 54621 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:19,598 INFO L93 Difference]: Finished difference Result 105458 states and 138388 transitions. [2022-11-21 16:37:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-21 16:37:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:19,919 INFO L225 Difference]: With dead ends: 105458 [2022-11-21 16:37:19,919 INFO L226 Difference]: Without dead ends: 63909 [2022-11-21 16:37:19,941 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 [2022-11-21 16:37:19,941 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 440 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1445 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:19,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1445 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-21 16:37:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63909 states. [2022-11-21 16:37:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63909 to 59950. [2022-11-21 16:37:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59950 states, 59850 states have (on average 1.2822222222222222) internal successors, (76741), 59947 states have internal predecessors, (76741), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59950 states to 59950 states and 76839 transitions. [2022-11-21 16:37:21,138 INFO L78 Accepts]: Start accepts. Automaton has 59950 states and 76839 transitions. Word has length 40 [2022-11-21 16:37:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:21,139 INFO L495 AbstractCegarLoop]: Abstraction has 59950 states and 76839 transitions. [2022-11-21 16:37:21,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 59950 states and 76839 transitions. [2022-11-21 16:37:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-21 16:37:21,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:21,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:21,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-21 16:37:21,141 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1653138166, now seen corresponding path program 1 times [2022-11-21 16:37:21,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:21,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307792586] [2022-11-21 16:37:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:21,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:21,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307792586] [2022-11-21 16:37:21,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307792586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:21,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:21,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 16:37:21,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875733229] [2022-11-21 16:37:21,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:21,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:21,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:21,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:21,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:21,404 INFO L87 Difference]: Start difference. First operand 59950 states and 76839 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:22,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:22,529 INFO L93 Difference]: Finished difference Result 157117 states and 202813 transitions. [2022-11-21 16:37:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:22,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-11-21 16:37:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:22,714 INFO L225 Difference]: With dead ends: 157117 [2022-11-21 16:37:22,714 INFO L226 Difference]: Without dead ends: 97169 [2022-11-21 16:37:22,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:22,752 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 450 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:22,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 984 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:37:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97169 states. [2022-11-21 16:37:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97169 to 97090. [2022-11-21 16:37:24,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97090 states, 96990 states have (on average 1.274615939787607) internal successors, (123625), 97087 states have internal predecessors, (123625), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97090 states to 97090 states and 123723 transitions. [2022-11-21 16:37:24,663 INFO L78 Accepts]: Start accepts. Automaton has 97090 states and 123723 transitions. Word has length 40 [2022-11-21 16:37:24,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:24,663 INFO L495 AbstractCegarLoop]: Abstraction has 97090 states and 123723 transitions. [2022-11-21 16:37:24,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 97090 states and 123723 transitions. [2022-11-21 16:37:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 16:37:24,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:24,665 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] [2022-11-21 16:37:24,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-21 16:37:24,665 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1240470838, now seen corresponding path program 1 times [2022-11-21 16:37:24,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:24,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832361165] [2022-11-21 16:37:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:24,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:24,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:24,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832361165] [2022-11-21 16:37:24,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832361165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:24,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:24,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:24,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047756199] [2022-11-21 16:37:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:24,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:24,759 INFO L87 Difference]: Start difference. First operand 97090 states and 123723 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-21 16:37:25,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:25,994 INFO L93 Difference]: Finished difference Result 174054 states and 221151 transitions. [2022-11-21 16:37:25,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:25,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-21 16:37:25,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:26,420 INFO L225 Difference]: With dead ends: 174054 [2022-11-21 16:37:26,420 INFO L226 Difference]: Without dead ends: 174051 [2022-11-21 16:37:26,496 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 [2022-11-21 16:37:26,497 INFO L413 NwaCegarLoop]: 1036 mSDtfsCounter, 527 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:26,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1576 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:37:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174051 states. [2022-11-21 16:37:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174051 to 173830. [2022-11-21 16:37:29,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173830 states, 173730 states have (on average 1.269723133598112) internal successors, (220589), 173827 states have internal predecessors, (220589), 98 states have call successors, (98), 2 states have call predecessors, (98), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:30,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173830 states to 173830 states and 220687 transitions. [2022-11-21 16:37:30,151 INFO L78 Accepts]: Start accepts. Automaton has 173830 states and 220687 transitions. Word has length 45 [2022-11-21 16:37:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:30,152 INFO L495 AbstractCegarLoop]: Abstraction has 173830 states and 220687 transitions. [2022-11-21 16:37:30,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2022-11-21 16:37:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 173830 states and 220687 transitions. [2022-11-21 16:37:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-21 16:37:30,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:30,153 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] [2022-11-21 16:37:30,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-21 16:37:30,154 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1976305641, now seen corresponding path program 1 times [2022-11-21 16:37:30,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:30,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739014704] [2022-11-21 16:37:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:30,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739014704] [2022-11-21 16:37:30,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739014704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:30,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:30,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:30,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980082470] [2022-11-21 16:37:30,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:30,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:37:30,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:30,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:37:30,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:37:30,215 INFO L87 Difference]: Start difference. First operand 173830 states and 220687 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-21 16:37:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:33,755 INFO L93 Difference]: Finished difference Result 454683 states and 576582 transitions. [2022-11-21 16:37:33,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:37:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 48 [2022-11-21 16:37:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:34,384 INFO L225 Difference]: With dead ends: 454683 [2022-11-21 16:37:34,384 INFO L226 Difference]: Without dead ends: 280855 [2022-11-21 16:37:34,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:37:34,469 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 753 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:34,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 725 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 16:37:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280855 states. [2022-11-21 16:37:37,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280855 to 173825. [2022-11-21 16:37:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173825 states, 173730 states have (on average 1.2597075922408334) internal successors, (218849), 173822 states have internal predecessors, (218849), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173825 states to 173825 states and 218942 transitions. [2022-11-21 16:37:37,800 INFO L78 Accepts]: Start accepts. Automaton has 173825 states and 218942 transitions. Word has length 48 [2022-11-21 16:37:37,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:37,800 INFO L495 AbstractCegarLoop]: Abstraction has 173825 states and 218942 transitions. [2022-11-21 16:37:37,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-21 16:37:37,801 INFO L276 IsEmpty]: Start isEmpty. Operand 173825 states and 218942 transitions. [2022-11-21 16:37:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 16:37:37,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:37,802 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] [2022-11-21 16:37:37,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-21 16:37:37,803 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash 951319779, now seen corresponding path program 1 times [2022-11-21 16:37:37,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215902984] [2022-11-21 16:37:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:37,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:37,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215902984] [2022-11-21 16:37:37,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215902984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:37,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:37,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032807951] [2022-11-21 16:37:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:37,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:37,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:37,874 INFO L87 Difference]: Start difference. First operand 173825 states and 218942 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2022-11-21 16:37:40,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:40,379 INFO L93 Difference]: Finished difference Result 343392 states and 432799 transitions. [2022-11-21 16:37:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:40,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 58 [2022-11-21 16:37:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:40,615 INFO L225 Difference]: With dead ends: 343392 [2022-11-21 16:37:40,615 INFO L226 Difference]: Without dead ends: 169569 [2022-11-21 16:37:40,722 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 [2022-11-21 16:37:40,722 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 389 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:40,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 361 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-21 16:37:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169569 states. [2022-11-21 16:37:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169569 to 89809. [2022-11-21 16:37:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89809 states, 89714 states have (on average 1.2017299418151013) internal successors, (107812), 89806 states have internal predecessors, (107812), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89809 states to 89809 states and 107905 transitions. [2022-11-21 16:37:43,202 INFO L78 Accepts]: Start accepts. Automaton has 89809 states and 107905 transitions. Word has length 58 [2022-11-21 16:37:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:43,203 INFO L495 AbstractCegarLoop]: Abstraction has 89809 states and 107905 transitions. [2022-11-21 16:37:43,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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) [2022-11-21 16:37:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 89809 states and 107905 transitions. [2022-11-21 16:37:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-21 16:37:43,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:43,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:43,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-21 16:37:43,205 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:43,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1754865588, now seen corresponding path program 1 times [2022-11-21 16:37:43,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:43,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818920603] [2022-11-21 16:37:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:43,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:37:43,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:43,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818920603] [2022-11-21 16:37:43,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818920603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:43,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:43,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:43,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972628341] [2022-11-21 16:37:43,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:43,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:43,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:43,300 INFO L87 Difference]: Start difference. First operand 89809 states and 107905 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-11-21 16:37:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:43,767 INFO L93 Difference]: Finished difference Result 128298 states and 153371 transitions. [2022-11-21 16:37:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 113 [2022-11-21 16:37:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:44,354 INFO L225 Difference]: With dead ends: 128298 [2022-11-21 16:37:44,355 INFO L226 Difference]: Without dead ends: 128293 [2022-11-21 16:37:44,377 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 [2022-11-21 16:37:44,378 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 445 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:44,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 1264 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:37:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128293 states. [2022-11-21 16:37:46,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128293 to 128079. [2022-11-21 16:37:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128079 states, 127984 states have (on average 1.1906722715339417) internal successors, (152387), 128076 states have internal predecessors, (152387), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128079 states to 128079 states and 152480 transitions. [2022-11-21 16:37:46,476 INFO L78 Accepts]: Start accepts. Automaton has 128079 states and 152480 transitions. Word has length 113 [2022-11-21 16:37:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:46,477 INFO L495 AbstractCegarLoop]: Abstraction has 128079 states and 152480 transitions. [2022-11-21 16:37:46,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-11-21 16:37:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 128079 states and 152480 transitions. [2022-11-21 16:37:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-21 16:37:46,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:46,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-21 16:37:46,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash 149557454, now seen corresponding path program 1 times [2022-11-21 16:37:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54746723] [2022-11-21 16:37:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:46,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-21 16:37:46,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:46,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54746723] [2022-11-21 16:37:46,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54746723] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:46,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:46,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:46,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016781548] [2022-11-21 16:37:46,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:46,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:46,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:46,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:46,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:46,600 INFO L87 Difference]: Start difference. First operand 128079 states and 152480 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-21 16:37:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:48,650 INFO L93 Difference]: Finished difference Result 275491 states and 332198 transitions. [2022-11-21 16:37:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:48,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 144 [2022-11-21 16:37:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:48,850 INFO L225 Difference]: With dead ends: 275491 [2022-11-21 16:37:48,850 INFO L226 Difference]: Without dead ends: 147535 [2022-11-21 16:37:48,897 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 [2022-11-21 16:37:48,898 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 323 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:48,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 518 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 16:37:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147535 states. [2022-11-21 16:37:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147535 to 147227. [2022-11-21 16:37:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147227 states, 147132 states have (on average 1.1926773237636952) internal successors, (175481), 147224 states have internal predecessors, (175481), 93 states have call successors, (93), 2 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:37:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147227 states to 147227 states and 175574 transitions. [2022-11-21 16:37:51,464 INFO L78 Accepts]: Start accepts. Automaton has 147227 states and 175574 transitions. Word has length 144 [2022-11-21 16:37:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:37:51,464 INFO L495 AbstractCegarLoop]: Abstraction has 147227 states and 175574 transitions. [2022-11-21 16:37:51,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-21 16:37:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 147227 states and 175574 transitions. [2022-11-21 16:37:51,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-21 16:37:51,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:37:51,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:37:51,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-21 16:37:51,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 16:37:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:37:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1572407842, now seen corresponding path program 1 times [2022-11-21 16:37:51,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:37:51,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551482115] [2022-11-21 16:37:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:37:51,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:37:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:37:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 16:37:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:37:52,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551482115] [2022-11-21 16:37:52,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551482115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:37:52,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:37:52,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:37:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287693733] [2022-11-21 16:37:52,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:37:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:37:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:37:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:37:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:52,218 INFO L87 Difference]: Start difference. First operand 147227 states and 175574 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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) [2022-11-21 16:37:54,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:37:54,615 INFO L93 Difference]: Finished difference Result 424126 states and 506087 transitions. [2022-11-21 16:37:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:37:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 146 [2022-11-21 16:37:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:37:54,995 INFO L225 Difference]: With dead ends: 424126 [2022-11-21 16:37:54,995 INFO L226 Difference]: Without dead ends: 277022 [2022-11-21 16:37:55,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:37:55,072 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 513 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:37:55,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 916 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:37:55,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277022 states.