./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN --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 a0cf3566e24b445695278143ce06a9bd6b4348c9de696d02fe86c47eb1775574 --- 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-6b4ec56 [2022-11-20 12:45:17,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:45:17,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:45:17,113 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:45:17,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:45:17,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:45:17,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:45:17,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:45:17,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:45:17,121 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:45:17,122 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:45:17,123 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:45:17,124 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:45:17,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:45:17,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:45:17,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:45:17,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:45:17,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:45:17,131 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:45:17,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:45:17,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:45:17,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:45:17,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:45:17,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:45:17,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:45:17,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:45:17,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:45:17,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:45:17,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:45:17,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:45:17,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:45:17,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:45:17,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:45:17,165 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:45:17,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:45:17,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:45:17,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:45:17,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:45:17,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:45:17,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:45:17,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:45:17,175 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 12:45:17,211 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:45:17,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:45:17,217 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:45:17,217 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:45:17,218 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:45:17,218 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:45:17,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:45:17,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:45:17,219 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:45:17,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:45:17,221 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:45:17,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:45:17,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:45:17,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:45:17,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 12:45:17,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:45:17,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 12:45:17,222 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:45:17,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 12:45:17,223 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:45:17,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 12:45:17,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:45:17,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:45:17,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:45:17,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:45:17,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:45:17,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:45:17,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 12:45:17,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:45:17,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:45:17,226 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 12:45:17,226 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 12:45:17,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 12:45:17,227 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_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0cf3566e24b445695278143ce06a9bd6b4348c9de696d02fe86c47eb1775574 [2022-11-20 12:45:17,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:45:17,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:45:17,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:45:17,526 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:45:17,528 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:45:17,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2022-11-20 12:45:20,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:45:20,865 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:45:20,872 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2022-11-20 12:45:20,889 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/data/019c36cf0/d2585fe2773241e798207d5cd43cb57b/FLAGf5af59d85 [2022-11-20 12:45:20,903 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/data/019c36cf0/d2585fe2773241e798207d5cd43cb57b [2022-11-20 12:45:20,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:45:20,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:45:20,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:45:20,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:45:20,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:45:20,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:45:20" (1/1) ... [2022-11-20 12:45:20,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e120b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:20, skipping insertion in model container [2022-11-20 12:45:20,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:45:20" (1/1) ... [2022-11-20 12:45:20,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:45:20,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:45:21,113 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_60f22777-9fce-4596-b430-51ae5bceda4b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[913,926] [2022-11-20 12:45:21,154 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_60f22777-9fce-4596-b430-51ae5bceda4b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[5977,5990] [2022-11-20 12:45:21,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:45:21,262 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:45:21,274 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_60f22777-9fce-4596-b430-51ae5bceda4b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[913,926] [2022-11-20 12:45:21,289 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_60f22777-9fce-4596-b430-51ae5bceda4b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-2.c[5977,5990] [2022-11-20 12:45:21,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:45:21,366 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:45:21,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21 WrapperNode [2022-11-20 12:45:21,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:45:21,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:45:21,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:45:21,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:45:21,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,425 INFO L138 Inliner]: procedures = 62, calls = 70, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 770 [2022-11-20 12:45:21,425 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:45:21,426 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:45:21,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:45:21,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:45:21,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,469 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:45:21,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:45:21,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:45:21,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:45:21,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (1/1) ... [2022-11-20 12:45:21,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:45:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:21,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:45:21,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:45:21,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 12:45:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 12:45:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 12:45:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-20 12:45:21,584 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-20 12:45:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-20 12:45:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-20 12:45:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-20 12:45:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-20 12:45:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-20 12:45:21,585 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-20 12:45:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-20 12:45:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-20 12:45:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-20 12:45:21,586 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-20 12:45:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 12:45:21,586 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-20 12:45:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-20 12:45:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:45:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:45:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-20 12:45:21,587 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-20 12:45:21,587 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-20 12:45:21,588 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-20 12:45:21,762 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:45:21,782 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:45:22,567 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:45:22,576 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:45:22,576 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-20 12:45:22,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:45:22 BoogieIcfgContainer [2022-11-20 12:45:22,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:45:22,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:45:22,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:45:22,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:45:22,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:45:20" (1/3) ... [2022-11-20 12:45:22,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d55a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:45:22, skipping insertion in model container [2022-11-20 12:45:22,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:45:21" (2/3) ... [2022-11-20 12:45:22,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d55a1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:45:22, skipping insertion in model container [2022-11-20 12:45:22,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:45:22" (3/3) ... [2022-11-20 12:45:22,590 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-2.c [2022-11-20 12:45:22,614 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:45:22,614 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 12:45:22,691 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:45:22,698 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;@6b52101a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:45:22,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 12:45:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 337 states, 295 states have (on average 1.6305084745762712) internal successors, (481), 302 states have internal predecessors, (481), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-20 12:45:22,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:45:22,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:22,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:22,724 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1847499811, now seen corresponding path program 1 times [2022-11-20 12:45:22,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:22,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971747833] [2022-11-20 12:45:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:22,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:23,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:23,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 12:45:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:23,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:23,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971747833] [2022-11-20 12:45:23,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971747833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:23,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:23,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:45:23,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11235848] [2022-11-20 12:45:23,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:23,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:23,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:45:23,086 INFO L87 Difference]: Start difference. First operand has 337 states, 295 states have (on average 1.6305084745762712) internal successors, (481), 302 states have internal predecessors, (481), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:45:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:23,635 INFO L93 Difference]: Finished difference Result 723 states and 1156 transitions. [2022-11-20 12:45:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:23,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-20 12:45:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:23,658 INFO L225 Difference]: With dead ends: 723 [2022-11-20 12:45:23,659 INFO L226 Difference]: Without dead ends: 396 [2022-11-20 12:45:23,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:23,675 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 657 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:23,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 680 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:45:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-11-20 12:45:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 390. [2022-11-20 12:45:23,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 344 states have (on average 1.505813953488372) internal successors, (518), 349 states have internal predecessors, (518), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2022-11-20 12:45:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 586 transitions. [2022-11-20 12:45:23,789 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 586 transitions. Word has length 44 [2022-11-20 12:45:23,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:23,789 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 586 transitions. [2022-11-20 12:45:23,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:45:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 586 transitions. [2022-11-20 12:45:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:45:23,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:23,798 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] [2022-11-20 12:45:23,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:45:23,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:23,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2047693479, now seen corresponding path program 1 times [2022-11-20 12:45:23,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:23,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191621128] [2022-11-20 12:45:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:23,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:23,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:23,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:45:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:23,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191621128] [2022-11-20 12:45:23,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191621128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:23,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:23,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:45:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511136522] [2022-11-20 12:45:23,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:23,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:23,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:45:23,924 INFO L87 Difference]: Start difference. First operand 390 states and 586 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:45:24,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:24,391 INFO L93 Difference]: Finished difference Result 638 states and 926 transitions. [2022-11-20 12:45:24,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-20 12:45:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:24,396 INFO L225 Difference]: With dead ends: 638 [2022-11-20 12:45:24,396 INFO L226 Difference]: Without dead ends: 514 [2022-11-20 12:45:24,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:24,398 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 280 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:24,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 876 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:45:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-11-20 12:45:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 457. [2022-11-20 12:45:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 405 states have (on average 1.4864197530864198) internal successors, (602), 410 states have internal predecessors, (602), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2022-11-20 12:45:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 676 transitions. [2022-11-20 12:45:24,452 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 676 transitions. Word has length 45 [2022-11-20 12:45:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:24,453 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 676 transitions. [2022-11-20 12:45:24,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:45:24,453 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 676 transitions. [2022-11-20 12:45:24,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 12:45:24,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:24,455 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] [2022-11-20 12:45:24,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:45:24,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:24,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash 763336018, now seen corresponding path program 1 times [2022-11-20 12:45:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:24,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565331234] [2022-11-20 12:45:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:24,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:24,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 12:45:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:24,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:24,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565331234] [2022-11-20 12:45:24,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565331234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:24,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:24,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:45:24,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644212995] [2022-11-20 12:45:24,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:24,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:24,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:24,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:45:24,564 INFO L87 Difference]: Start difference. First operand 457 states and 676 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:45:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:25,000 INFO L93 Difference]: Finished difference Result 865 states and 1235 transitions. [2022-11-20 12:45:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:25,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-20 12:45:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:25,007 INFO L225 Difference]: With dead ends: 865 [2022-11-20 12:45:25,008 INFO L226 Difference]: Without dead ends: 674 [2022-11-20 12:45:25,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:25,012 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 673 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:25,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 651 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:45:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-20 12:45:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 622. [2022-11-20 12:45:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 551 states have (on average 1.4373865698729582) internal successors, (792), 559 states have internal predecessors, (792), 47 states have call successors, (47), 22 states have call predecessors, (47), 22 states have return successors, (55), 41 states have call predecessors, (55), 43 states have call successors, (55) [2022-11-20 12:45:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 894 transitions. [2022-11-20 12:45:25,074 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 894 transitions. Word has length 45 [2022-11-20 12:45:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:25,074 INFO L495 AbstractCegarLoop]: Abstraction has 622 states and 894 transitions. [2022-11-20 12:45:25,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 12:45:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 894 transitions. [2022-11-20 12:45:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 12:45:25,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:25,077 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:25,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:45:25,078 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:25,078 INFO L85 PathProgramCache]: Analyzing trace with hash 313583757, now seen corresponding path program 1 times [2022-11-20 12:45:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632903279] [2022-11-20 12:45:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 12:45:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:45:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 12:45:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632903279] [2022-11-20 12:45:25,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632903279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:25,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:25,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:45:25,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50881134] [2022-11-20 12:45:25,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:25,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:25,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:25,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:45:25,210 INFO L87 Difference]: Start difference. First operand 622 states and 894 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:45:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:25,722 INFO L93 Difference]: Finished difference Result 1206 states and 1679 transitions. [2022-11-20 12:45:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:25,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2022-11-20 12:45:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:25,730 INFO L225 Difference]: With dead ends: 1206 [2022-11-20 12:45:25,730 INFO L226 Difference]: Without dead ends: 850 [2022-11-20 12:45:25,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:25,741 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 264 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:25,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 930 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:45:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-20 12:45:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 812. [2022-11-20 12:45:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 717 states have (on average 1.383542538354254) internal successors, (992), 727 states have internal predecessors, (992), 61 states have call successors, (61), 30 states have call predecessors, (61), 32 states have return successors, (79), 55 states have call predecessors, (79), 57 states have call successors, (79) [2022-11-20 12:45:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1132 transitions. [2022-11-20 12:45:25,806 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1132 transitions. Word has length 62 [2022-11-20 12:45:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:25,808 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1132 transitions. [2022-11-20 12:45:25,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:45:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1132 transitions. [2022-11-20 12:45:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:45:25,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:25,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:25,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:45:25,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:25,818 INFO L85 PathProgramCache]: Analyzing trace with hash 37906234, now seen corresponding path program 1 times [2022-11-20 12:45:25,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:25,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195698118] [2022-11-20 12:45:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:25,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 12:45:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 12:45:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 12:45:25,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:25,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195698118] [2022-11-20 12:45:25,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195698118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:25,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:25,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:45:25,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670464680] [2022-11-20 12:45:25,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:25,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:25,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:25,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:45:25,935 INFO L87 Difference]: Start difference. First operand 812 states and 1132 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:45:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:26,334 INFO L93 Difference]: Finished difference Result 1465 states and 1985 transitions. [2022-11-20 12:45:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:26,336 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2022-11-20 12:45:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:26,343 INFO L225 Difference]: With dead ends: 1465 [2022-11-20 12:45:26,343 INFO L226 Difference]: Without dead ends: 1011 [2022-11-20 12:45:26,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:26,346 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 663 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:26,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 646 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:45:26,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-11-20 12:45:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 956. [2022-11-20 12:45:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 845 states have (on average 1.352662721893491) internal successors, (1143), 857 states have internal predecessors, (1143), 69 states have call successors, (69), 36 states have call predecessors, (69), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2022-11-20 12:45:26,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1305 transitions. [2022-11-20 12:45:26,418 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1305 transitions. Word has length 67 [2022-11-20 12:45:26,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:26,418 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1305 transitions. [2022-11-20 12:45:26,418 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:45:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1305 transitions. [2022-11-20 12:45:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:45:26,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:26,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:26,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:45:26,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:26,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2022374513, now seen corresponding path program 1 times [2022-11-20 12:45:26,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:26,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968823106] [2022-11-20 12:45:26,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:26,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:26,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:45:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:26,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:45:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 12:45:26,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968823106] [2022-11-20 12:45:26,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968823106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:26,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596849034] [2022-11-20 12:45:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:26,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:26,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:26,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:26,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:45:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 12:45:26,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 12:45:26,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:45:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596849034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:26,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:45:26,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 12:45:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677534626] [2022-11-20 12:45:26,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:26,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:26,801 INFO L87 Difference]: Start difference. First operand 956 states and 1305 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:45:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:26,873 INFO L93 Difference]: Finished difference Result 1499 states and 2028 transitions. [2022-11-20 12:45:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2022-11-20 12:45:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:26,879 INFO L225 Difference]: With dead ends: 1499 [2022-11-20 12:45:26,879 INFO L226 Difference]: Without dead ends: 954 [2022-11-20 12:45:26,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:26,881 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 72 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:26,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1012 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:45:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-20 12:45:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 910. [2022-11-20 12:45:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 805 states have (on average 1.3391304347826087) internal successors, (1078), 817 states have internal predecessors, (1078), 65 states have call successors, (65), 34 states have call predecessors, (65), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2022-11-20 12:45:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1230 transitions. [2022-11-20 12:45:26,988 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1230 transitions. Word has length 68 [2022-11-20 12:45:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:26,989 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1230 transitions. [2022-11-20 12:45:26,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 12:45:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1230 transitions. [2022-11-20 12:45:26,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:45:26,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:26,991 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] [2022-11-20 12:45:27,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:27,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:27,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 157597262, now seen corresponding path program 1 times [2022-11-20 12:45:27,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:27,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100460174] [2022-11-20 12:45:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:27,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:27,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:27,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:45:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:27,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:45:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:45:27,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100460174] [2022-11-20 12:45:27,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100460174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:27,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976138050] [2022-11-20 12:45:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:27,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:27,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:27,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:45:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 12:45:27,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 12:45:27,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:45:27,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976138050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:27,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:45:27,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-20 12:45:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327932842] [2022-11-20 12:45:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:27,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:45:27,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:45:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:45:27,563 INFO L87 Difference]: Start difference. First operand 910 states and 1230 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 12:45:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:27,670 INFO L93 Difference]: Finished difference Result 1404 states and 1879 transitions. [2022-11-20 12:45:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-11-20 12:45:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:27,677 INFO L225 Difference]: With dead ends: 1404 [2022-11-20 12:45:27,677 INFO L226 Difference]: Without dead ends: 1002 [2022-11-20 12:45:27,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:45:27,680 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 39 mSDsluCounter, 1474 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1980 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:27,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1980 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:45:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-20 12:45:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 934. [2022-11-20 12:45:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 829 states have (on average 1.3293124246079615) internal successors, (1102), 841 states have internal predecessors, (1102), 65 states have call successors, (65), 34 states have call predecessors, (65), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2022-11-20 12:45:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1254 transitions. [2022-11-20 12:45:27,750 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1254 transitions. Word has length 68 [2022-11-20 12:45:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:27,751 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1254 transitions. [2022-11-20 12:45:27,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 12:45:27,751 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1254 transitions. [2022-11-20 12:45:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 12:45:27,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:27,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:45:27,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:27,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:27,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash 744403276, now seen corresponding path program 1 times [2022-11-20 12:45:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:27,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115710362] [2022-11-20 12:45:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:28,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:45:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:28,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:45:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:45:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115710362] [2022-11-20 12:45:28,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115710362] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:28,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726525136] [2022-11-20 12:45:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:28,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:28,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:28,128 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:28,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:45:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 12:45:28,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:28,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 12:45:28,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726525136] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:28,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:45:28,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-20 12:45:28,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457516152] [2022-11-20 12:45:28,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:28,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:28,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:45:28,449 INFO L87 Difference]: Start difference. First operand 934 states and 1254 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:45:28,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:28,677 INFO L93 Difference]: Finished difference Result 986 states and 1316 transitions. [2022-11-20 12:45:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:45:28,678 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2022-11-20 12:45:28,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:28,683 INFO L225 Difference]: With dead ends: 986 [2022-11-20 12:45:28,683 INFO L226 Difference]: Without dead ends: 983 [2022-11-20 12:45:28,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 12:45:28,684 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 885 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:28,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 582 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:45:28,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-20 12:45:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 933. [2022-11-20 12:45:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 829 states have (on average 1.3268998793727382) internal successors, (1100), 840 states have internal predecessors, (1100), 64 states have call successors, (64), 34 states have call predecessors, (64), 38 states have return successors, (87), 59 states have call predecessors, (87), 61 states have call successors, (87) [2022-11-20 12:45:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1251 transitions. [2022-11-20 12:45:28,750 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1251 transitions. Word has length 68 [2022-11-20 12:45:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:28,751 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1251 transitions. [2022-11-20 12:45:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 12:45:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1251 transitions. [2022-11-20 12:45:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:45:28,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:28,753 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 12:45:28,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:28,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 12:45:28,964 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:28,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:28,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1600611039, now seen corresponding path program 1 times [2022-11-20 12:45:28,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:28,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056465029] [2022-11-20 12:45:28,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:29,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:45:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:29,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 12:45:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 12:45:29,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056465029] [2022-11-20 12:45:29,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056465029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291260442] [2022-11-20 12:45:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:29,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:29,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:45:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:29,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 12:45:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:29,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:45:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 12:45:29,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291260442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:45:29,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:45:29,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-20 12:45:29,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689105066] [2022-11-20 12:45:29,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:45:29,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 12:45:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:29,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 12:45:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:45:29,577 INFO L87 Difference]: Start difference. First operand 933 states and 1251 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-20 12:45:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:31,637 INFO L93 Difference]: Finished difference Result 2320 states and 3008 transitions. [2022-11-20 12:45:31,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 12:45:31,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2022-11-20 12:45:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:31,644 INFO L225 Difference]: With dead ends: 2320 [2022-11-20 12:45:31,644 INFO L226 Difference]: Without dead ends: 1683 [2022-11-20 12:45:31,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=460, Invalid=2402, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 12:45:31,647 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 1379 mSDsluCounter, 2150 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:31,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 2557 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:45:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-11-20 12:45:31,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1133. [2022-11-20 12:45:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1009 states have (on average 1.3012884043607533) internal successors, (1313), 1026 states have internal predecessors, (1313), 73 states have call successors, (73), 41 states have call predecessors, (73), 49 states have return successors, (100), 66 states have call predecessors, (100), 70 states have call successors, (100) [2022-11-20 12:45:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1486 transitions. [2022-11-20 12:45:31,768 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1486 transitions. Word has length 69 [2022-11-20 12:45:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:31,768 INFO L495 AbstractCegarLoop]: Abstraction has 1133 states and 1486 transitions. [2022-11-20 12:45:31,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-11-20 12:45:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1486 transitions. [2022-11-20 12:45:31,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 12:45:31,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:31,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 12:45:31,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:31,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:31,977 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:31,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash 155816347, now seen corresponding path program 1 times [2022-11-20 12:45:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:31,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205039567] [2022-11-20 12:45:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:31,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:45:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 12:45:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 12:45:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-20 12:45:32,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:32,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205039567] [2022-11-20 12:45:32,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205039567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:32,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:32,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:45:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494759385] [2022-11-20 12:45:32,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:45:32,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:45:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:45:32,040 INFO L87 Difference]: Start difference. First operand 1133 states and 1486 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 12:45:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:32,491 INFO L93 Difference]: Finished difference Result 1851 states and 2368 transitions. [2022-11-20 12:45:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:45:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2022-11-20 12:45:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:32,496 INFO L225 Difference]: With dead ends: 1851 [2022-11-20 12:45:32,497 INFO L226 Difference]: Without dead ends: 1175 [2022-11-20 12:45:32,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:32,499 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 665 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:32,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 662 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:45:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-11-20 12:45:32,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1061. [2022-11-20 12:45:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 944 states have (on average 1.2944915254237288) internal successors, (1222), 961 states have internal predecessors, (1222), 70 states have call successors, (70), 38 states have call predecessors, (70), 45 states have return successors, (95), 62 states have call predecessors, (95), 67 states have call successors, (95) [2022-11-20 12:45:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1387 transitions. [2022-11-20 12:45:32,616 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1387 transitions. Word has length 88 [2022-11-20 12:45:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:32,616 INFO L495 AbstractCegarLoop]: Abstraction has 1061 states and 1387 transitions. [2022-11-20 12:45:32,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 12:45:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1387 transitions. [2022-11-20 12:45:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 12:45:32,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:32,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:32,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:45:32,621 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1428941089, now seen corresponding path program 1 times [2022-11-20 12:45:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:32,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142586860] [2022-11-20 12:45:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 12:45:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 12:45:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 12:45:32,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 12:45:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 12:45:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 12:45:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142586860] [2022-11-20 12:45:32,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142586860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:45:32,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779793374] [2022-11-20 12:45:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:32,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:32,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:45:32,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:45:32,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:45:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:32,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 12:45:32,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:45:32,897 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 12:45:32,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 12:45:32,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779793374] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:32,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 12:45:32,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 12:45:32,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631748312] [2022-11-20 12:45:32,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:32,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:45:32,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:32,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:45:32,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:45:32,900 INFO L87 Difference]: Start difference. First operand 1061 states and 1387 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 12:45:32,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:32,976 INFO L93 Difference]: Finished difference Result 1385 states and 1781 transitions. [2022-11-20 12:45:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:45:32,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2022-11-20 12:45:32,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:32,979 INFO L225 Difference]: With dead ends: 1385 [2022-11-20 12:45:32,979 INFO L226 Difference]: Without dead ends: 260 [2022-11-20 12:45:32,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:45:32,982 INFO L413 NwaCegarLoop]: 537 mSDtfsCounter, 60 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:32,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1005 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:45:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-20 12:45:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-11-20 12:45:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 1.5608695652173914) internal successors, (359), 232 states have internal predecessors, (359), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-20 12:45:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 403 transitions. [2022-11-20 12:45:33,015 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 403 transitions. Word has length 103 [2022-11-20 12:45:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:33,016 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 403 transitions. [2022-11-20 12:45:33,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 12:45:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 403 transitions. [2022-11-20 12:45:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:33,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:33,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:33,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:45:33,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60f22777-9fce-4596-b430-51ae5bceda4b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:45:33,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:33,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1566264591, now seen corresponding path program 1 times [2022-11-20 12:45:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:33,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855289302] [2022-11-20 12:45:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:33,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:33,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:33,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:33,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:33,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:33,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:33,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855289302] [2022-11-20 12:45:33,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855289302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:33,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:33,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:45:33,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030195403] [2022-11-20 12:45:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:33,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:45:33,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:45:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:45:33,366 INFO L87 Difference]: Start difference. First operand 260 states and 403 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:34,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:34,535 INFO L93 Difference]: Finished difference Result 595 states and 937 transitions. [2022-11-20 12:45:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:45:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:34,538 INFO L225 Difference]: With dead ends: 595 [2022-11-20 12:45:34,538 INFO L226 Difference]: Without dead ends: 347 [2022-11-20 12:45:34,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:45:34,540 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 668 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:34,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 525 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:45:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-20 12:45:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 260. [2022-11-20 12:45:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 230 states have (on average 1.5565217391304347) internal successors, (358), 232 states have internal predecessors, (358), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-20 12:45:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 402 transitions. [2022-11-20 12:45:34,592 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 402 transitions. Word has length 124 [2022-11-20 12:45:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:34,592 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 402 transitions. [2022-11-20 12:45:34,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 402 transitions. [2022-11-20 12:45:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:34,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:34,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:34,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:45:34,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:34,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1081339763, now seen corresponding path program 1 times [2022-11-20 12:45:34,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56174403] [2022-11-20 12:45:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:34,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:34,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:34,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:34,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:34,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:34,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:34,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56174403] [2022-11-20 12:45:34,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56174403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:34,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:34,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 12:45:34,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464985897] [2022-11-20 12:45:34,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:34,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:45:34,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:34,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:45:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:45:34,776 INFO L87 Difference]: Start difference. First operand 260 states and 402 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:37,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:37,072 INFO L93 Difference]: Finished difference Result 930 states and 1473 transitions. [2022-11-20 12:45:37,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:45:37,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:37,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:37,076 INFO L225 Difference]: With dead ends: 930 [2022-11-20 12:45:37,077 INFO L226 Difference]: Without dead ends: 686 [2022-11-20 12:45:37,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:45:37,079 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 1002 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:37,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 920 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 12:45:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-20 12:45:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 511. [2022-11-20 12:45:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 458 states have (on average 1.5698689956331877) internal successors, (719), 461 states have internal predecessors, (719), 39 states have call successors, (39), 13 states have call predecessors, (39), 13 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2022-11-20 12:45:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 798 transitions. [2022-11-20 12:45:37,152 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 798 transitions. Word has length 124 [2022-11-20 12:45:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:37,153 INFO L495 AbstractCegarLoop]: Abstraction has 511 states and 798 transitions. [2022-11-20 12:45:37,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 798 transitions. [2022-11-20 12:45:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:37,154 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:37,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:37,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 12:45:37,155 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2098988151, now seen corresponding path program 1 times [2022-11-20 12:45:37,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42119213] [2022-11-20 12:45:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:37,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:37,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:37,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42119213] [2022-11-20 12:45:37,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42119213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:37,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:37,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:37,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387378552] [2022-11-20 12:45:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:37,365 INFO L87 Difference]: Start difference. First operand 511 states and 798 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:40,167 INFO L93 Difference]: Finished difference Result 1528 states and 2422 transitions. [2022-11-20 12:45:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:45:40,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:40,172 INFO L225 Difference]: With dead ends: 1528 [2022-11-20 12:45:40,173 INFO L226 Difference]: Without dead ends: 1033 [2022-11-20 12:45:40,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:45:40,175 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1013 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 2347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:40,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 1713 Invalid, 2347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 12:45:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-11-20 12:45:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 745. [2022-11-20 12:45:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 669 states have (on average 1.5635276532137519) internal successors, (1046), 673 states have internal predecessors, (1046), 55 states have call successors, (55), 19 states have call predecessors, (55), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2022-11-20 12:45:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1159 transitions. [2022-11-20 12:45:40,266 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1159 transitions. Word has length 124 [2022-11-20 12:45:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:40,266 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1159 transitions. [2022-11-20 12:45:40,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:40,266 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1159 transitions. [2022-11-20 12:45:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:40,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:40,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:40,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 12:45:40,268 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:40,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1980546677, now seen corresponding path program 1 times [2022-11-20 12:45:40,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:40,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888345294] [2022-11-20 12:45:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:40,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:40,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:40,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:40,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:40,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:40,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888345294] [2022-11-20 12:45:40,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888345294] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:40,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:40,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:40,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904926017] [2022-11-20 12:45:40,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:40,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:40,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:40,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:40,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:40,471 INFO L87 Difference]: Start difference. First operand 745 states and 1159 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:43,397 INFO L93 Difference]: Finished difference Result 2409 states and 3811 transitions. [2022-11-20 12:45:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:45:43,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:43,405 INFO L225 Difference]: With dead ends: 2409 [2022-11-20 12:45:43,405 INFO L226 Difference]: Without dead ends: 1680 [2022-11-20 12:45:43,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:45:43,410 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1017 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:43,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1711 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 12:45:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2022-11-20 12:45:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1214. [2022-11-20 12:45:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1092 states have (on average 1.5576923076923077) internal successors, (1701), 1098 states have internal predecessors, (1701), 87 states have call successors, (87), 31 states have call predecessors, (87), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2022-11-20 12:45:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1886 transitions. [2022-11-20 12:45:43,577 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1886 transitions. Word has length 124 [2022-11-20 12:45:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:43,577 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1886 transitions. [2022-11-20 12:45:43,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1886 transitions. [2022-11-20 12:45:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:43,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:43,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:43,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 12:45:43,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -591252663, now seen corresponding path program 1 times [2022-11-20 12:45:43,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:43,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107080022] [2022-11-20 12:45:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:43,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:43,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:43,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:43,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:43,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:43,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:43,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107080022] [2022-11-20 12:45:43,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107080022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:43,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:43,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:43,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740261596] [2022-11-20 12:45:43,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:43,850 INFO L87 Difference]: Start difference. First operand 1214 states and 1886 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:45,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:45,298 INFO L93 Difference]: Finished difference Result 2862 states and 4521 transitions. [2022-11-20 12:45:45,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:45:45,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:45,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:45,306 INFO L225 Difference]: With dead ends: 2862 [2022-11-20 12:45:45,307 INFO L226 Difference]: Without dead ends: 1664 [2022-11-20 12:45:45,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:45:45,311 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 896 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 995 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:45,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 721 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 995 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 12:45:45,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-11-20 12:45:45,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1214. [2022-11-20 12:45:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1092 states have (on average 1.5531135531135531) internal successors, (1696), 1098 states have internal predecessors, (1696), 87 states have call successors, (87), 31 states have call predecessors, (87), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2022-11-20 12:45:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1881 transitions. [2022-11-20 12:45:45,512 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1881 transitions. Word has length 124 [2022-11-20 12:45:45,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:45,512 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 1881 transitions. [2022-11-20 12:45:45,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:45,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1881 transitions. [2022-11-20 12:45:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:45,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:45,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:45,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 12:45:45,515 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:45,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:45,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1837005959, now seen corresponding path program 1 times [2022-11-20 12:45:45,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:45,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872872390] [2022-11-20 12:45:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:45,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:45,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:45,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872872390] [2022-11-20 12:45:45,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872872390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:45,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:45,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397994055] [2022-11-20 12:45:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:45,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:45,738 INFO L87 Difference]: Start difference. First operand 1214 states and 1881 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:48,796 INFO L93 Difference]: Finished difference Result 4097 states and 6434 transitions. [2022-11-20 12:45:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:45:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:48,810 INFO L225 Difference]: With dead ends: 4097 [2022-11-20 12:45:48,810 INFO L226 Difference]: Without dead ends: 2899 [2022-11-20 12:45:48,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:45:48,815 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1006 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:48,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 1711 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 12:45:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2022-11-20 12:45:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2163. [2022-11-20 12:45:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 1949 states have (on average 1.5484864032837353) internal successors, (3018), 1959 states have internal predecessors, (3018), 151 states have call successors, (151), 55 states have call predecessors, (151), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2022-11-20 12:45:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3353 transitions. [2022-11-20 12:45:49,226 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3353 transitions. Word has length 124 [2022-11-20 12:45:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:49,227 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 3353 transitions. [2022-11-20 12:45:49,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3353 transitions. [2022-11-20 12:45:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:49,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:49,231 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 12:45:49,231 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash 529863561, now seen corresponding path program 1 times [2022-11-20 12:45:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414306943] [2022-11-20 12:45:49,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:49,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:49,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:49,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:49,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:49,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:49,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:49,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:49,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414306943] [2022-11-20 12:45:49,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414306943] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:49,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:49,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:49,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994346314] [2022-11-20 12:45:49,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:49,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:49,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:49,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:49,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:49,438 INFO L87 Difference]: Start difference. First operand 2163 states and 3353 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:51,243 INFO L93 Difference]: Finished difference Result 5052 states and 7944 transitions. [2022-11-20 12:45:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:45:51,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:51,256 INFO L225 Difference]: With dead ends: 5052 [2022-11-20 12:45:51,256 INFO L226 Difference]: Without dead ends: 2905 [2022-11-20 12:45:51,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:45:51,263 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 742 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:51,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 861 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:45:51,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2905 states. [2022-11-20 12:45:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2905 to 2163. [2022-11-20 12:45:51,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 1949 states have (on average 1.543868650590046) internal successors, (3009), 1959 states have internal predecessors, (3009), 151 states have call successors, (151), 55 states have call predecessors, (151), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2022-11-20 12:45:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 3344 transitions. [2022-11-20 12:45:51,587 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 3344 transitions. Word has length 124 [2022-11-20 12:45:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:51,587 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 3344 transitions. [2022-11-20 12:45:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 3344 transitions. [2022-11-20 12:45:51,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:51,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:51,590 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:51,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 12:45:51,590 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:51,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1867606969, now seen corresponding path program 1 times [2022-11-20 12:45:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:51,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64937759] [2022-11-20 12:45:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:51,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:51,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:51,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64937759] [2022-11-20 12:45:51,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64937759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:51,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:51,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854806893] [2022-11-20 12:45:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:51,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:51,801 INFO L87 Difference]: Start difference. First operand 2163 states and 3344 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:55,201 INFO L93 Difference]: Finished difference Result 7486 states and 11700 transitions. [2022-11-20 12:45:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:45:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:55,226 INFO L225 Difference]: With dead ends: 7486 [2022-11-20 12:45:55,226 INFO L226 Difference]: Without dead ends: 5339 [2022-11-20 12:45:55,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-20 12:45:55,233 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 998 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2190 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:55,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 1711 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2190 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 12:45:55,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2022-11-20 12:45:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4073. [2022-11-20 12:45:55,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 3675 states have (on average 1.5393197278911566) internal successors, (5657), 3693 states have internal predecessors, (5657), 279 states have call successors, (279), 103 states have call predecessors, (279), 118 states have return successors, (374), 292 states have call predecessors, (374), 277 states have call successors, (374) [2022-11-20 12:45:55,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 6310 transitions. [2022-11-20 12:45:55,871 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 6310 transitions. Word has length 124 [2022-11-20 12:45:55,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:55,872 INFO L495 AbstractCegarLoop]: Abstraction has 4073 states and 6310 transitions. [2022-11-20 12:45:55,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 6310 transitions. [2022-11-20 12:45:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:55,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:55,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:55,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 12:45:55,877 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:55,878 INFO L85 PathProgramCache]: Analyzing trace with hash -836566071, now seen corresponding path program 1 times [2022-11-20 12:45:55,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:55,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543640001] [2022-11-20 12:45:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:55,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:55,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:56,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:56,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:56,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:56,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:56,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543640001] [2022-11-20 12:45:56,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543640001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:56,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:56,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:56,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286259185] [2022-11-20 12:45:56,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:56,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:56,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:56,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:56,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:56,052 INFO L87 Difference]: Start difference. First operand 4073 states and 6310 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:45:58,112 INFO L93 Difference]: Finished difference Result 9428 states and 14799 transitions. [2022-11-20 12:45:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:45:58,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:45:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:45:58,137 INFO L225 Difference]: With dead ends: 9428 [2022-11-20 12:45:58,137 INFO L226 Difference]: Without dead ends: 5371 [2022-11-20 12:45:58,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-20 12:45:58,149 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 739 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:45:58,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 859 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:45:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2022-11-20 12:45:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4073. [2022-11-20 12:45:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 3675 states have (on average 1.5346938775510204) internal successors, (5640), 3693 states have internal predecessors, (5640), 279 states have call successors, (279), 103 states have call predecessors, (279), 118 states have return successors, (374), 292 states have call predecessors, (374), 277 states have call successors, (374) [2022-11-20 12:45:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 6293 transitions. [2022-11-20 12:45:58,902 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 6293 transitions. Word has length 124 [2022-11-20 12:45:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:45:58,902 INFO L495 AbstractCegarLoop]: Abstraction has 4073 states and 6293 transitions. [2022-11-20 12:45:58,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:45:58,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 6293 transitions. [2022-11-20 12:45:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:45:58,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:45:58,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:45:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 12:45:58,907 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:45:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:45:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1551997959, now seen corresponding path program 1 times [2022-11-20 12:45:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:45:58,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808585569] [2022-11-20 12:45:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:45:58,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:45:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:45:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:45:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:45:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:45:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:45:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:45:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:45:59,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:45:59,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808585569] [2022-11-20 12:45:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808585569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:45:59,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:45:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:45:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238770374] [2022-11-20 12:45:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:45:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:45:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:45:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:45:59,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:45:59,093 INFO L87 Difference]: Start difference. First operand 4073 states and 6293 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:03,985 INFO L93 Difference]: Finished difference Result 15784 states and 24570 transitions. [2022-11-20 12:46:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:46:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:46:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:04,032 INFO L225 Difference]: With dead ends: 15784 [2022-11-20 12:46:04,032 INFO L226 Difference]: Without dead ends: 11727 [2022-11-20 12:46:04,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:46:04,046 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1052 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 2576 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:04,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1697 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2576 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 12:46:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11727 states. [2022-11-20 12:46:05,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11727 to 7715. [2022-11-20 12:46:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7715 states, 6965 states have (on average 1.5270638908829863) internal successors, (10636), 6999 states have internal predecessors, (10636), 519 states have call successors, (519), 199 states have call predecessors, (519), 230 states have return successors, (792), 548 states have call predecessors, (792), 517 states have call successors, (792) [2022-11-20 12:46:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7715 states to 7715 states and 11947 transitions. [2022-11-20 12:46:05,310 INFO L78 Accepts]: Start accepts. Automaton has 7715 states and 11947 transitions. Word has length 124 [2022-11-20 12:46:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:05,310 INFO L495 AbstractCegarLoop]: Abstraction has 7715 states and 11947 transitions. [2022-11-20 12:46:05,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7715 states and 11947 transitions. [2022-11-20 12:46:05,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:46:05,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:05,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:05,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 12:46:05,317 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1141898231, now seen corresponding path program 1 times [2022-11-20 12:46:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:05,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827004534] [2022-11-20 12:46:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:05,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:05,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:46:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:05,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:46:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:05,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:46:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:46:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:05,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:46:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:05,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:05,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:05,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827004534] [2022-11-20 12:46:05,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827004534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:05,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:05,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:46:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028334372] [2022-11-20 12:46:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:05,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:46:05,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:46:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:46:05,512 INFO L87 Difference]: Start difference. First operand 7715 states and 11947 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:12,270 INFO L93 Difference]: Finished difference Result 29856 states and 46594 transitions. [2022-11-20 12:46:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:46:12,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:46:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:12,352 INFO L225 Difference]: With dead ends: 29856 [2022-11-20 12:46:12,352 INFO L226 Difference]: Without dead ends: 22157 [2022-11-20 12:46:12,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:46:12,378 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 1208 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:12,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1701 Invalid, 2191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2127 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 12:46:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2022-11-20 12:46:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 15140. [2022-11-20 12:46:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15140 states, 13702 states have (on average 1.527222303313385) internal successors, (20926), 13768 states have internal predecessors, (20926), 983 states have call successors, (983), 391 states have call predecessors, (983), 454 states have return successors, (1774), 1044 states have call predecessors, (1774), 981 states have call successors, (1774) [2022-11-20 12:46:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15140 states to 15140 states and 23683 transitions. [2022-11-20 12:46:15,590 INFO L78 Accepts]: Start accepts. Automaton has 15140 states and 23683 transitions. Word has length 124 [2022-11-20 12:46:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:15,590 INFO L495 AbstractCegarLoop]: Abstraction has 15140 states and 23683 transitions. [2022-11-20 12:46:15,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 15140 states and 23683 transitions. [2022-11-20 12:46:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:46:15,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:15,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:15,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 12:46:15,601 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2096337863, now seen corresponding path program 1 times [2022-11-20 12:46:15,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:15,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151808965] [2022-11-20 12:46:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:15,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:15,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:46:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:15,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:46:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:15,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:46:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:15,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:46:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:15,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:46:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:15,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:15,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151808965] [2022-11-20 12:46:15,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151808965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:15,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:15,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:46:15,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590688619] [2022-11-20 12:46:15,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:15,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:46:15,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:46:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:46:15,788 INFO L87 Difference]: Start difference. First operand 15140 states and 23683 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:27,520 INFO L93 Difference]: Finished difference Result 56893 states and 89764 transitions. [2022-11-20 12:46:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:46:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:46:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:27,698 INFO L225 Difference]: With dead ends: 56893 [2022-11-20 12:46:27,698 INFO L226 Difference]: Without dead ends: 41769 [2022-11-20 12:46:27,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:46:27,746 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 1184 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1902 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:27,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1206 Valid, 1126 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1902 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 12:46:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41769 states. [2022-11-20 12:46:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41769 to 30022. [2022-11-20 12:46:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30022 states, 27240 states have (on average 1.529588839941263) internal successors, (41666), 27370 states have internal predecessors, (41666), 1879 states have call successors, (1879), 775 states have call predecessors, (1879), 902 states have return successors, (4192), 2004 states have call predecessors, (4192), 1877 states have call successors, (4192) [2022-11-20 12:46:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30022 states to 30022 states and 47737 transitions. [2022-11-20 12:46:34,213 INFO L78 Accepts]: Start accepts. Automaton has 30022 states and 47737 transitions. Word has length 124 [2022-11-20 12:46:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:46:34,214 INFO L495 AbstractCegarLoop]: Abstraction has 30022 states and 47737 transitions. [2022-11-20 12:46:34,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30022 states and 47737 transitions. [2022-11-20 12:46:34,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 12:46:34,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:46:34,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:46:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 12:46:34,234 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 12:46:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:46:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash 477362949, now seen corresponding path program 1 times [2022-11-20 12:46:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:46:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400283870] [2022-11-20 12:46:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:46:34,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:46:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 12:46:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-11-20 12:46:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-20 12:46:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-11-20 12:46:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-11-20 12:46:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:46:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:46:34,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:46:34,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400283870] [2022-11-20 12:46:34,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400283870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:46:34,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:46:34,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:46:34,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395634931] [2022-11-20 12:46:34,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:46:34,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:46:34,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:46:34,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:46:34,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:46:34,438 INFO L87 Difference]: Start difference. First operand 30022 states and 47737 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 12:46:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:46:51,571 INFO L93 Difference]: Finished difference Result 110813 states and 177708 transitions. [2022-11-20 12:46:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 12:46:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 124 [2022-11-20 12:46:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:46:51,920 INFO L225 Difference]: With dead ends: 110813 [2022-11-20 12:46:51,920 INFO L226 Difference]: Without dead ends: 80807 [2022-11-20 12:46:52,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:46:52,003 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 1085 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1107 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:46:52,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1107 Valid, 1701 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2087 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 12:46:52,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80807 states.