./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.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_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/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_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/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_057c7a8e-6619-4615-bd15-360796ed2b95/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 ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 --- 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 10:55:36,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:55:36,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:55:36,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:55:36,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:55:36,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:55:36,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:55:36,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:55:36,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:55:36,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:55:36,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:55:36,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:55:36,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:55:36,228 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:55:36,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:55:36,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:55:36,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:55:36,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:55:36,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:55:36,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:55:36,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:55:36,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:55:36,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:55:36,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:55:36,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:55:36,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:55:36,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:55:36,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:55:36,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:55:36,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:55:36,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:55:36,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:55:36,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:55:36,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:55:36,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:55:36,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:55:36,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:55:36,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:55:36,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:55:36,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:55:36,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:55:36,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:55:36,316 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:55:36,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:55:36,317 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:55:36,317 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:55:36,318 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:55:36,318 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:55:36,319 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:55:36,319 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:55:36,319 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:55:36,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:55:36,321 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:55:36,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:55:36,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:55:36,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:55:36,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:55:36,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:55:36,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:55:36,322 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:55:36,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:55:36,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:55:36,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:55:36,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:55:36,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:55:36,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:55:36,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:36,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:55:36,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:55:36,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:55:36,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:55:36,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:55:36,326 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:55:36,326 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:55:36,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:55:36,327 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_057c7a8e-6619-4615-bd15-360796ed2b95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebe8677bb7c1f5255df364410243bb239a688bf1d1729cbbc508fc2f6afa38f5 [2022-11-20 10:55:36,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:55:36,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:55:36,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:55:36,723 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:55:36,724 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:55:36,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-20 10:55:39,956 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:55:40,303 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:55:40,304 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-20 10:55:40,329 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/data/e68ec0a5d/dc26bed899564ec198eacb5bfe9d5011/FLAG87cb3584d [2022-11-20 10:55:40,345 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/data/e68ec0a5d/dc26bed899564ec198eacb5bfe9d5011 [2022-11-20 10:55:40,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:55:40,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:55:40,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:55:40,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:55:40,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:55:40,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:40,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d388aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40, skipping insertion in model container [2022-11-20 10:55:40,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:40,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:55:40,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:55:40,583 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_057c7a8e-6619-4615-bd15-360796ed2b95/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[913,926] [2022-11-20 10:55:40,638 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_057c7a8e-6619-4615-bd15-360796ed2b95/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2022-11-20 10:55:40,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:55:40,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:55:40,845 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_057c7a8e-6619-4615-bd15-360796ed2b95/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[913,926] [2022-11-20 10:55:40,864 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_057c7a8e-6619-4615-bd15-360796ed2b95/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.06.cil-1.c[5977,5990] [2022-11-20 10:55:40,911 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:55:40,933 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:55:40,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40 WrapperNode [2022-11-20 10:55:40,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:55:40,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:55:40,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:55:40,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:55:40,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:40,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,021 INFO L138 Inliner]: procedures = 60, calls = 67, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 712 [2022-11-20 10:55:41,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:55:41,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:55:41,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:55:41,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:55:41,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:55:41,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:55:41,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:55:41,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:55:41,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (1/1) ... [2022-11-20 10:55:41,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:55:41,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:41,187 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:55:41,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:55:41,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:55:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 10:55:41,237 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 10:55:41,237 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-20 10:55:41,243 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-20 10:55:41,244 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-20 10:55:41,244 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-20 10:55:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-20 10:55:41,245 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-20 10:55:41,245 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-20 10:55:41,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-20 10:55:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-20 10:55:41,246 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-20 10:55:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-20 10:55:41,246 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-20 10:55:41,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:55:41,247 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-20 10:55:41,247 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-20 10:55:41,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:55:41,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:55:41,247 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-20 10:55:41,247 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-20 10:55:41,248 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-11-20 10:55:41,248 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-11-20 10:55:41,369 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:55:41,372 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:55:42,288 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:55:42,304 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:55:42,306 INFO L300 CfgBuilder]: Removed 13 assume(true) statements. [2022-11-20 10:55:42,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:55:42 BoogieIcfgContainer [2022-11-20 10:55:42,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:55:42,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:55:42,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:55:42,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:55:42,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:55:40" (1/3) ... [2022-11-20 10:55:42,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688de82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:55:42, skipping insertion in model container [2022-11-20 10:55:42,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:55:40" (2/3) ... [2022-11-20 10:55:42,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@688de82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:55:42, skipping insertion in model container [2022-11-20 10:55:42,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:55:42" (3/3) ... [2022-11-20 10:55:42,328 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.06.cil-1.c [2022-11-20 10:55:42,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:55:42,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 10:55:42,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:55:42,455 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;@215a2fb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:55:42,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:55:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-20 10:55:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 10:55:42,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:42,472 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 10:55:42,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash -953270584, now seen corresponding path program 1 times [2022-11-20 10:55:42,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616832104] [2022-11-20 10:55:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:42,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:42,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:42,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-20 10:55:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:42,900 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 10:55:42,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:42,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616832104] [2022-11-20 10:55:42,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616832104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:42,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:42,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:42,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320368639] [2022-11-20 10:55:42,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:42,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:42,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:42,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:42,975 INFO L87 Difference]: Start difference. First operand has 312 states, 271 states have (on average 1.6236162361623616) internal successors, (440), 278 states have internal predecessors, (440), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) 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 10:55:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:43,770 INFO L93 Difference]: Finished difference Result 674 states and 1072 transitions. [2022-11-20 10:55:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:43,775 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 10:55:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:43,788 INFO L225 Difference]: With dead ends: 674 [2022-11-20 10:55:43,788 INFO L226 Difference]: Without dead ends: 371 [2022-11-20 10:55:43,793 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 10:55:43,797 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 597 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:43,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 630 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 10:55:43,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-11-20 10:55:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 365. [2022-11-20 10:55:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 320 states have (on average 1.496875) internal successors, (479), 325 states have internal predecessors, (479), 32 states have call successors, (32), 12 states have call predecessors, (32), 11 states have return successors, (34), 28 states have call predecessors, (34), 28 states have call successors, (34) [2022-11-20 10:55:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 545 transitions. [2022-11-20 10:55:43,926 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 545 transitions. Word has length 44 [2022-11-20 10:55:43,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:43,927 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 545 transitions. [2022-11-20 10:55:43,927 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 10:55:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 545 transitions. [2022-11-20 10:55:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 10:55:43,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:43,931 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 10:55:43,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:55:43,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash 215630895, now seen corresponding path program 1 times [2022-11-20 10:55:43,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837264330] [2022-11-20 10:55:43,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 10:55:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,033 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 10:55:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:44,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837264330] [2022-11-20 10:55:44,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837264330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:44,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:44,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:44,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664588616] [2022-11-20 10:55:44,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:44,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:44,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:44,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:44,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:44,039 INFO L87 Difference]: Start difference. First operand 365 states and 545 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 10:55:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:44,640 INFO L93 Difference]: Finished difference Result 613 states and 885 transitions. [2022-11-20 10:55:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:44,642 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 10:55:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:44,646 INFO L225 Difference]: With dead ends: 613 [2022-11-20 10:55:44,646 INFO L226 Difference]: Without dead ends: 489 [2022-11-20 10:55:44,647 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 10:55:44,648 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 250 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:44,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 846 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 10:55:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-20 10:55:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 432. [2022-11-20 10:55:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 381 states have (on average 1.4776902887139107) internal successors, (563), 386 states have internal predecessors, (563), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (37), 31 states have call predecessors, (37), 31 states have call successors, (37) [2022-11-20 10:55:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 635 transitions. [2022-11-20 10:55:44,691 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 635 transitions. Word has length 45 [2022-11-20 10:55:44,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:44,692 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 635 transitions. [2022-11-20 10:55:44,692 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 10:55:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 635 transitions. [2022-11-20 10:55:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 10:55:44,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:44,694 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 10:55:44,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:55:44,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:44,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:44,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1068726566, now seen corresponding path program 1 times [2022-11-20 10:55:44,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989101920] [2022-11-20 10:55:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:44,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-20 10:55:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:44,813 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 10:55:44,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:44,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989101920] [2022-11-20 10:55:44,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989101920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:44,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:44,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:44,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560102404] [2022-11-20 10:55:44,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:44,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:44,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:44,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:44,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:44,817 INFO L87 Difference]: Start difference. First operand 432 states and 635 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 10:55:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:45,333 INFO L93 Difference]: Finished difference Result 840 states and 1194 transitions. [2022-11-20 10:55:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:45,334 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 10:55:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:45,343 INFO L225 Difference]: With dead ends: 840 [2022-11-20 10:55:45,343 INFO L226 Difference]: Without dead ends: 649 [2022-11-20 10:55:45,350 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 10:55:45,355 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 606 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:45,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 628 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:55:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-20 10:55:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 597. [2022-11-20 10:55:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 527 states have (on average 1.4288425047438331) internal successors, (753), 535 states have internal predecessors, (753), 46 states have call successors, (46), 22 states have call predecessors, (46), 22 states have return successors, (54), 40 states have call predecessors, (54), 42 states have call successors, (54) [2022-11-20 10:55:45,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 853 transitions. [2022-11-20 10:55:45,473 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 853 transitions. Word has length 45 [2022-11-20 10:55:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:45,474 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 853 transitions. [2022-11-20 10:55:45,476 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 10:55:45,476 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 853 transitions. [2022-11-20 10:55:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 10:55:45,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:45,487 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 10:55:45,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:55:45,487 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:45,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash -642295496, now seen corresponding path program 1 times [2022-11-20 10:55:45,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:45,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709339869] [2022-11-20 10:55:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:45,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:45,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-20 10:55:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:45,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 10:55:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:45,676 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 10:55:45,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:45,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709339869] [2022-11-20 10:55:45,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709339869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:45,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:45,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:45,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509840152] [2022-11-20 10:55:45,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:45,681 INFO L87 Difference]: Start difference. First operand 597 states and 853 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 10:55:46,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:46,239 INFO L93 Difference]: Finished difference Result 1181 states and 1638 transitions. [2022-11-20 10:55:46,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:46,240 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 10:55:46,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:46,248 INFO L225 Difference]: With dead ends: 1181 [2022-11-20 10:55:46,248 INFO L226 Difference]: Without dead ends: 825 [2022-11-20 10:55:46,253 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 10:55:46,262 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 234 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:46,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 898 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:55:46,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-11-20 10:55:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 787. [2022-11-20 10:55:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 693 states have (on average 1.3751803751803753) internal successors, (953), 703 states have internal predecessors, (953), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (78), 54 states have call predecessors, (78), 56 states have call successors, (78) [2022-11-20 10:55:46,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1091 transitions. [2022-11-20 10:55:46,345 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1091 transitions. Word has length 62 [2022-11-20 10:55:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:46,348 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1091 transitions. [2022-11-20 10:55:46,348 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 10:55:46,348 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1091 transitions. [2022-11-20 10:55:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 10:55:46,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:46,353 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 10:55:46,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:55:46,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash -897620696, now seen corresponding path program 1 times [2022-11-20 10:55:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:46,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290600604] [2022-11-20 10:55:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:55:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-11-20 10:55:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:46,472 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 10:55:46,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:46,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290600604] [2022-11-20 10:55:46,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290600604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:46,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:46,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:46,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124440606] [2022-11-20 10:55:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:46,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:46,478 INFO L87 Difference]: Start difference. First operand 787 states and 1091 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 10:55:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:46,905 INFO L93 Difference]: Finished difference Result 1440 states and 1944 transitions. [2022-11-20 10:55:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:46,906 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 10:55:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:46,912 INFO L225 Difference]: With dead ends: 1440 [2022-11-20 10:55:46,912 INFO L226 Difference]: Without dead ends: 986 [2022-11-20 10:55:46,914 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 10:55:46,915 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 593 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:46,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 626 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:55:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-11-20 10:55:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 931. [2022-11-20 10:55:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 821 states have (on average 1.3447015834348355) internal successors, (1104), 833 states have internal predecessors, (1104), 68 states have call successors, (68), 36 states have call predecessors, (68), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-20 10:55:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1264 transitions. [2022-11-20 10:55:46,993 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1264 transitions. Word has length 67 [2022-11-20 10:55:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:46,994 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1264 transitions. [2022-11-20 10:55:46,994 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 10:55:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1264 transitions. [2022-11-20 10:55:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 10:55:46,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:46,996 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 10:55:46,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:55:46,997 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:46,997 INFO L85 PathProgramCache]: Analyzing trace with hash -252493793, now seen corresponding path program 1 times [2022-11-20 10:55:46,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:46,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59705370] [2022-11-20 10:55:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:46,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:47,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 10:55:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 10:55:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:47,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59705370] [2022-11-20 10:55:47,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59705370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724606285] [2022-11-20 10:55:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:47,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:47,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:47,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:55:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:47,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 10:55:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:47,500 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 10:55:47,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:47,577 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 10:55:47,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724606285] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:47,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:55:47,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2022-11-20 10:55:47,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025745374] [2022-11-20 10:55:47,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:47,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:47,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:47,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:47,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:55:47,580 INFO L87 Difference]: Start difference. First operand 931 states and 1264 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 10:55:47,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:47,791 INFO L93 Difference]: Finished difference Result 987 states and 1332 transitions. [2022-11-20 10:55:47,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:55:47,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 10:55:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:47,798 INFO L225 Difference]: With dead ends: 987 [2022-11-20 10:55:47,798 INFO L226 Difference]: Without dead ends: 984 [2022-11-20 10:55:47,799 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 10:55:47,802 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 811 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:47,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 546 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:55:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-11-20 10:55:47,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 930. [2022-11-20 10:55:47,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 821 states have (on average 1.3422655298416566) internal successors, (1102), 832 states have internal predecessors, (1102), 67 states have call successors, (67), 36 states have call predecessors, (67), 40 states have return successors, (92), 62 states have call predecessors, (92), 64 states have call successors, (92) [2022-11-20 10:55:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1261 transitions. [2022-11-20 10:55:47,891 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1261 transitions. Word has length 68 [2022-11-20 10:55:47,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:47,891 INFO L495 AbstractCegarLoop]: Abstraction has 930 states and 1261 transitions. [2022-11-20 10:55:47,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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 10:55:47,892 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1261 transitions. [2022-11-20 10:55:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 10:55:47,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:47,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:47,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:48,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:48,101 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash 761646347, now seen corresponding path program 1 times [2022-11-20 10:55:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387870153] [2022-11-20 10:55:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:48,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:48,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 10:55:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:48,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-20 10:55:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 10:55:48,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:48,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387870153] [2022-11-20 10:55:48,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387870153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:48,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957019770] [2022-11-20 10:55:48,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:48,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:48,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:48,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:55:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:55:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:48,775 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 10:55:48,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:55:48,881 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 10:55:48,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957019770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:55:48,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:55:48,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2022-11-20 10:55:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592257323] [2022-11-20 10:55:48,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:55:48,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 10:55:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:48,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 10:55:48,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:55:48,885 INFO L87 Difference]: Start difference. First operand 930 states and 1261 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 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 10:55:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:50,964 INFO L93 Difference]: Finished difference Result 2630 states and 3481 transitions. [2022-11-20 10:55:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 10:55:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 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 10:55:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:50,975 INFO L225 Difference]: With dead ends: 2630 [2022-11-20 10:55:50,975 INFO L226 Difference]: Without dead ends: 2086 [2022-11-20 10:55:50,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 10:55:50,979 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 1343 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 2597 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:50,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1370 Valid, 2597 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:55:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2022-11-20 10:55:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1319. [2022-11-20 10:55:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1171 states have (on average 1.3116994022203246) internal successors, (1536), 1190 states have internal predecessors, (1536), 87 states have call successors, (87), 50 states have call predecessors, (87), 59 states have return successors, (126), 79 states have call predecessors, (126), 84 states have call successors, (126) [2022-11-20 10:55:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1749 transitions. [2022-11-20 10:55:51,150 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1749 transitions. Word has length 69 [2022-11-20 10:55:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:51,151 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1749 transitions. [2022-11-20 10:55:51,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 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 10:55:51,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1749 transitions. [2022-11-20 10:55:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 10:55:51,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:51,156 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 10:55:51,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:51,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:55:51,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:51,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:51,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1915961298, now seen corresponding path program 1 times [2022-11-20 10:55:51,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:51,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928752914] [2022-11-20 10:55:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:51,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:51,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:51,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 10:55:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:51,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 10:55:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:51,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 10:55:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:51,458 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 10:55:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:51,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928752914] [2022-11-20 10:55:51,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928752914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:51,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:51,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 10:55:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980479271] [2022-11-20 10:55:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:51,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:55:51,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:55:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:55:51,462 INFO L87 Difference]: Start difference. First operand 1319 states and 1749 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 10:55:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:51,976 INFO L93 Difference]: Finished difference Result 2084 states and 2736 transitions. [2022-11-20 10:55:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:55:51,977 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 10:55:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:51,983 INFO L225 Difference]: With dead ends: 2084 [2022-11-20 10:55:51,983 INFO L226 Difference]: Without dead ends: 1239 [2022-11-20 10:55:51,986 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 10:55:51,987 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 608 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:51,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 640 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:55:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-11-20 10:55:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1182. [2022-11-20 10:55:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1050 states have (on average 1.3123809523809524) internal successors, (1378), 1068 states have internal predecessors, (1378), 79 states have call successors, (79), 44 states have call predecessors, (79), 51 states have return successors, (112), 70 states have call predecessors, (112), 76 states have call successors, (112) [2022-11-20 10:55:52,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1569 transitions. [2022-11-20 10:55:52,097 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1569 transitions. Word has length 88 [2022-11-20 10:55:52,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:52,097 INFO L495 AbstractCegarLoop]: Abstraction has 1182 states and 1569 transitions. [2022-11-20 10:55:52,097 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 10:55:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1569 transitions. [2022-11-20 10:55:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-20 10:55:52,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:52,108 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 10:55:52,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:55:52,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1247723609, now seen corresponding path program 1 times [2022-11-20 10:55:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:52,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344607151] [2022-11-20 10:55:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-20 10:55:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 10:55:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-20 10:55:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-20 10:55:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-20 10:55:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,246 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 10:55:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344607151] [2022-11-20 10:55:52,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344607151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:55:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149890999] [2022-11-20 10:55:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:52,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:52,249 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:52,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:55:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:55:52,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:52,497 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 10:55:52,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:52,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149890999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:52,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:55:52,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 10:55:52,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476665158] [2022-11-20 10:55:52,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:52,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:52,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:55:52,501 INFO L87 Difference]: Start difference. First operand 1182 states and 1569 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 10:55:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:52,663 INFO L93 Difference]: Finished difference Result 1561 states and 2037 transitions. [2022-11-20 10:55:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:52,667 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 10:55:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:52,669 INFO L225 Difference]: With dead ends: 1561 [2022-11-20 10:55:52,670 INFO L226 Difference]: Without dead ends: 235 [2022-11-20 10:55:52,672 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 10:55:52,673 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 62 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:52,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 928 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:55:52,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-20 10:55:52,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-11-20 10:55:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5533980582524272) internal successors, (320), 208 states have internal predecessors, (320), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-20 10:55:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 362 transitions. [2022-11-20 10:55:52,696 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 362 transitions. Word has length 103 [2022-11-20 10:55:52,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:52,697 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 362 transitions. [2022-11-20 10:55:52,697 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 10:55:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 362 transitions. [2022-11-20 10:55:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:55:52,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:52,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:52,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:52,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_057c7a8e-6619-4615-bd15-360796ed2b95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:52,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:52,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:52,907 INFO L85 PathProgramCache]: Analyzing trace with hash 490472779, now seen corresponding path program 1 times [2022-11-20 10:55:52,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:52,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194105312] [2022-11-20 10:55:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:52,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:55:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:53,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:55:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:53,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:55:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:55:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:53,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:55:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:53,046 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 10:55:53,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:53,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194105312] [2022-11-20 10:55:53,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194105312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:53,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:53,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 10:55:53,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255857890] [2022-11-20 10:55:53,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 10:55:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:53,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 10:55:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:55:53,049 INFO L87 Difference]: Start difference. First operand 235 states and 362 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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 10:55:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:54,220 INFO L93 Difference]: Finished difference Result 536 states and 840 transitions. [2022-11-20 10:55:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:55:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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 113 [2022-11-20 10:55:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:54,224 INFO L225 Difference]: With dead ends: 536 [2022-11-20 10:55:54,224 INFO L226 Difference]: Without dead ends: 311 [2022-11-20 10:55:54,226 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 10:55:54,226 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 595 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:54,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 477 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 10:55:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-20 10:55:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 235. [2022-11-20 10:55:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 206 states have (on average 1.5485436893203883) internal successors, (319), 208 states have internal predecessors, (319), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-20 10:55:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 361 transitions. [2022-11-20 10:55:54,275 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 361 transitions. Word has length 113 [2022-11-20 10:55:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:54,276 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 361 transitions. [2022-11-20 10:55:54,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 3 states have internal predecessors, (102), 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 10:55:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 361 transitions. [2022-11-20 10:55:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:55:54,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:54,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:54,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:55:54,279 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:54,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1937785843, now seen corresponding path program 1 times [2022-11-20 10:55:54,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:54,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981600416] [2022-11-20 10:55:54,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:54,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:54,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:55:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:54,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:55:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:54,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:55:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:54,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:55:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:54,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:55:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:54,486 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 10:55:54,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:54,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981600416] [2022-11-20 10:55:54,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981600416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:54,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:54,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 10:55:54,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173622208] [2022-11-20 10:55:54,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:54,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 10:55:54,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 10:55:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 10:55:54,490 INFO L87 Difference]: Start difference. First operand 235 states and 361 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 10:55:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:56,818 INFO L93 Difference]: Finished difference Result 833 states and 1312 transitions. [2022-11-20 10:55:56,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:55:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 113 [2022-11-20 10:55:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:56,822 INFO L225 Difference]: With dead ends: 833 [2022-11-20 10:55:56,823 INFO L226 Difference]: Without dead ends: 613 [2022-11-20 10:55:56,824 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 10:55:56,825 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 887 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 900 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:56,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [900 Valid, 835 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1336 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 10:55:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-11-20 10:55:56,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 460. [2022-11-20 10:55:56,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 409 states have (on average 1.5623471882640587) internal successors, (639), 412 states have internal predecessors, (639), 37 states have call successors, (37), 13 states have call predecessors, (37), 13 states have return successors, (38), 35 states have call predecessors, (38), 35 states have call successors, (38) [2022-11-20 10:55:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 714 transitions. [2022-11-20 10:55:56,889 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 714 transitions. Word has length 113 [2022-11-20 10:55:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:56,889 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 714 transitions. [2022-11-20 10:55:56,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 4 states have internal predecessors, (102), 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 10:55:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 714 transitions. [2022-11-20 10:55:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:55:56,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:56,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:56,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:55:56,892 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:56,893 INFO L85 PathProgramCache]: Analyzing trace with hash -943533047, now seen corresponding path program 1 times [2022-11-20 10:55:56,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:56,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231068857] [2022-11-20 10:55:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:56,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:55:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:55:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:55:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:55:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:55:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:57,131 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 10:55:57,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231068857] [2022-11-20 10:55:57,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231068857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:57,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:57,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:55:57,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249563424] [2022-11-20 10:55:57,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:57,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:55:57,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:55:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:55:57,134 INFO L87 Difference]: Start difference. First operand 460 states and 714 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:55:59,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:59,795 INFO L93 Difference]: Finished difference Result 1366 states and 2152 transitions. [2022-11-20 10:55:59,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:55:59,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:55:59,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:59,801 INFO L225 Difference]: With dead ends: 1366 [2022-11-20 10:55:59,801 INFO L226 Difference]: Without dead ends: 921 [2022-11-20 10:55:59,803 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 10:55:59,804 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 896 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:59,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1549 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 10:55:59,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2022-11-20 10:55:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 670. [2022-11-20 10:55:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 597 states have (on average 1.5561139028475712) internal successors, (929), 601 states have internal predecessors, (929), 52 states have call successors, (52), 19 states have call predecessors, (52), 20 states have return successors, (55), 51 states have call predecessors, (55), 50 states have call successors, (55) [2022-11-20 10:55:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1036 transitions. [2022-11-20 10:55:59,927 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1036 transitions. Word has length 113 [2022-11-20 10:55:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:59,928 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1036 transitions. [2022-11-20 10:55:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:55:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1036 transitions. [2022-11-20 10:55:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:55:59,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:59,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:55:59,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:55:59,930 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 407852171, now seen corresponding path program 1 times [2022-11-20 10:55:59,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:59,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960475956] [2022-11-20 10:55:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:59,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:00,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:00,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960475956] [2022-11-20 10:56:00,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960475956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:00,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:00,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:00,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499715988] [2022-11-20 10:56:00,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:00,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:00,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:00,165 INFO L87 Difference]: Start difference. First operand 670 states and 1036 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:02,694 INFO L93 Difference]: Finished difference Result 2151 states and 3382 transitions. [2022-11-20 10:56:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:56:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:02,702 INFO L225 Difference]: With dead ends: 2151 [2022-11-20 10:56:02,702 INFO L226 Difference]: Without dead ends: 1496 [2022-11-20 10:56:02,705 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 10:56:02,706 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 962 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:02,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 1026 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 10:56:02,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-20 10:56:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1091. [2022-11-20 10:56:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 974 states have (on average 1.5503080082135523) internal successors, (1510), 980 states have internal predecessors, (1510), 82 states have call successors, (82), 31 states have call predecessors, (82), 34 states have return successors, (93), 83 states have call predecessors, (93), 80 states have call successors, (93) [2022-11-20 10:56:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1685 transitions. [2022-11-20 10:56:02,858 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1685 transitions. Word has length 113 [2022-11-20 10:56:02,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:02,858 INFO L495 AbstractCegarLoop]: Abstraction has 1091 states and 1685 transitions. [2022-11-20 10:56:02,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:02,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1685 transitions. [2022-11-20 10:56:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:56:02,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:02,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:02,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:56:02,861 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:02,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1211122743, now seen corresponding path program 1 times [2022-11-20 10:56:02,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:02,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479397468] [2022-11-20 10:56:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:02,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:02,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:02,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:02,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:03,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:03,039 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 10:56:03,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:03,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479397468] [2022-11-20 10:56:03,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479397468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:03,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:03,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:03,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347104965] [2022-11-20 10:56:03,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:03,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:03,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:03,042 INFO L87 Difference]: Start difference. First operand 1091 states and 1685 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:06,023 INFO L93 Difference]: Finished difference Result 3664 states and 5743 transitions. [2022-11-20 10:56:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:56:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:06,037 INFO L225 Difference]: With dead ends: 3664 [2022-11-20 10:56:06,037 INFO L226 Difference]: Without dead ends: 2588 [2022-11-20 10:56:06,041 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 10:56:06,042 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 894 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 2009 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:06,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1547 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2009 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 10:56:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-20 10:56:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1934. [2022-11-20 10:56:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1729 states have (on average 1.545401966454598) internal successors, (2672), 1739 states have internal predecessors, (2672), 142 states have call successors, (142), 55 states have call predecessors, (142), 62 states have return successors, (175), 147 states have call predecessors, (175), 140 states have call successors, (175) [2022-11-20 10:56:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 2989 transitions. [2022-11-20 10:56:06,335 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 2989 transitions. Word has length 113 [2022-11-20 10:56:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:06,335 INFO L495 AbstractCegarLoop]: Abstraction has 1934 states and 2989 transitions. [2022-11-20 10:56:06,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:06,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 2989 transitions. [2022-11-20 10:56:06,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:56:06,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:06,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:06,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 10:56:06,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2094631733, now seen corresponding path program 1 times [2022-11-20 10:56:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909492434] [2022-11-20 10:56:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:06,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:06,566 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 10:56:06,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:06,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909492434] [2022-11-20 10:56:06,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909492434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:06,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:06,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:06,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660431826] [2022-11-20 10:56:06,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:06,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:06,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:06,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:06,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:06,569 INFO L87 Difference]: Start difference. First operand 1934 states and 2989 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:09,647 INFO L93 Difference]: Finished difference Result 6682 states and 10469 transitions. [2022-11-20 10:56:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:56:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:09,667 INFO L225 Difference]: With dead ends: 6682 [2022-11-20 10:56:09,668 INFO L226 Difference]: Without dead ends: 4763 [2022-11-20 10:56:09,675 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 10:56:09,675 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 890 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1981 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:09,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 1547 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1981 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-20 10:56:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4763 states. [2022-11-20 10:56:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4763 to 3634. [2022-11-20 10:56:10,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3253 states have (on average 1.5431909007070397) internal successors, (5020), 3271 states have internal predecessors, (5020), 262 states have call successors, (262), 103 states have call predecessors, (262), 118 states have return successors, (357), 275 states have call predecessors, (357), 260 states have call successors, (357) [2022-11-20 10:56:10,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 5639 transitions. [2022-11-20 10:56:10,309 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 5639 transitions. Word has length 113 [2022-11-20 10:56:10,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:10,309 INFO L495 AbstractCegarLoop]: Abstraction has 3634 states and 5639 transitions. [2022-11-20 10:56:10,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:10,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 5639 transitions. [2022-11-20 10:56:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:56:10,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:10,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:10,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:56:10,315 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:10,315 INFO L85 PathProgramCache]: Analyzing trace with hash 259753549, now seen corresponding path program 1 times [2022-11-20 10:56:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:10,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528920109] [2022-11-20 10:56:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:10,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:10,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528920109] [2022-11-20 10:56:10,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528920109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:10,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:10,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003660774] [2022-11-20 10:56:10,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:10,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:10,551 INFO L87 Difference]: Start difference. First operand 3634 states and 5639 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:14,262 INFO L93 Difference]: Finished difference Result 12736 states and 20013 transitions. [2022-11-20 10:56:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 10:56:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:14,303 INFO L225 Difference]: With dead ends: 12736 [2022-11-20 10:56:14,303 INFO L226 Difference]: Without dead ends: 9117 [2022-11-20 10:56:14,315 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 10:56:14,316 INFO L413 NwaCegarLoop]: 356 mSDtfsCounter, 889 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1968 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:14,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [902 Valid, 1547 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1968 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-20 10:56:14,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2022-11-20 10:56:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 7047. [2022-11-20 10:56:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 6314 states have (on average 1.5416534684827368) internal successors, (9734), 6348 states have internal predecessors, (9734), 502 states have call successors, (502), 199 states have call predecessors, (502), 230 states have return successors, (775), 531 states have call predecessors, (775), 500 states have call successors, (775) [2022-11-20 10:56:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11011 transitions. [2022-11-20 10:56:15,564 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11011 transitions. Word has length 113 [2022-11-20 10:56:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:15,564 INFO L495 AbstractCegarLoop]: Abstraction has 7047 states and 11011 transitions. [2022-11-20 10:56:15,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11011 transitions. [2022-11-20 10:56:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:56:15,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:15,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 10:56:15,571 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2136816779, now seen corresponding path program 1 times [2022-11-20 10:56:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129715317] [2022-11-20 10:56:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:15,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:15,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:15,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:15,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:15,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:15,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:15,777 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 10:56:15,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:15,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129715317] [2022-11-20 10:56:15,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129715317] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:15,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:15,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:15,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746309066] [2022-11-20 10:56:15,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:15,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:15,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:15,780 INFO L87 Difference]: Start difference. First operand 7047 states and 11011 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:21,269 INFO L93 Difference]: Finished difference Result 27819 states and 43773 transitions. [2022-11-20 10:56:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:56:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:21,354 INFO L225 Difference]: With dead ends: 27819 [2022-11-20 10:56:21,354 INFO L226 Difference]: Without dead ends: 20787 [2022-11-20 10:56:21,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:56:21,380 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1140 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:21,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 1537 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 10:56:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20787 states. [2022-11-20 10:56:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20787 to 13808. [2022-11-20 10:56:23,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13808 states, 12403 states have (on average 1.54349754091752) internal successors, (19144), 12469 states have internal predecessors, (19144), 950 states have call successors, (950), 391 states have call predecessors, (950), 454 states have return successors, (1741), 1011 states have call predecessors, (1741), 948 states have call successors, (1741) [2022-11-20 10:56:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13808 states to 13808 states and 21835 transitions. [2022-11-20 10:56:23,960 INFO L78 Accepts]: Start accepts. Automaton has 13808 states and 21835 transitions. Word has length 113 [2022-11-20 10:56:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:23,960 INFO L495 AbstractCegarLoop]: Abstraction has 13808 states and 21835 transitions. [2022-11-20 10:56:23,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:23,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13808 states and 21835 transitions. [2022-11-20 10:56:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:56:23,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:23,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:23,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 10:56:23,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1366083213, now seen corresponding path program 1 times [2022-11-20 10:56:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363002116] [2022-11-20 10:56:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:24,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:24,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:24,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:24,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:56:24,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:24,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363002116] [2022-11-20 10:56:24,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363002116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:24,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:24,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:24,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306084315] [2022-11-20 10:56:24,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:24,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:24,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:24,179 INFO L87 Difference]: Start difference. First operand 13808 states and 21835 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:33,760 INFO L93 Difference]: Finished difference Result 53954 states and 85811 transitions. [2022-11-20 10:56:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:56:33,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:33,950 INFO L225 Difference]: With dead ends: 53954 [2022-11-20 10:56:33,950 INFO L226 Difference]: Without dead ends: 40161 [2022-11-20 10:56:34,007 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 10:56:34,008 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 939 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:34,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1533 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-20 10:56:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40161 states. [2022-11-20 10:56:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40161 to 26657. [2022-11-20 10:56:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26657 states, 23940 states have (on average 1.5389306599832915) internal successors, (36842), 24070 states have internal predecessors, (36842), 1814 states have call successors, (1814), 775 states have call predecessors, (1814), 902 states have return successors, (4127), 1939 states have call predecessors, (4127), 1812 states have call successors, (4127) [2022-11-20 10:56:37,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26657 states to 26657 states and 42783 transitions. [2022-11-20 10:56:37,514 INFO L78 Accepts]: Start accepts. Automaton has 26657 states and 42783 transitions. Word has length 113 [2022-11-20 10:56:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:56:37,515 INFO L495 AbstractCegarLoop]: Abstraction has 26657 states and 42783 transitions. [2022-11-20 10:56:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 26657 states and 42783 transitions. [2022-11-20 10:56:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:56:37,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:56:37,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:56:37,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 10:56:37,537 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:56:37,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:56:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash 371389515, now seen corresponding path program 1 times [2022-11-20 10:56:37,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:56:37,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653420849] [2022-11-20 10:56:37,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:56:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:56:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:37,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:56:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:37,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:56:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:37,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:56:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:37,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:56:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:37,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:56:37,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:56:37,721 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 10:56:37,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:56:37,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653420849] [2022-11-20 10:56:37,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653420849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:56:37,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:56:37,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:56:37,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541482402] [2022-11-20 10:56:37,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:56:37,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:56:37,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:56:37,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:56:37,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:56:37,724 INFO L87 Difference]: Start difference. First operand 26657 states and 42783 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:56:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:56:52,023 INFO L93 Difference]: Finished difference Result 103121 states and 166425 transitions. [2022-11-20 10:56:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 10:56:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 113 [2022-11-20 10:56:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:56:52,437 INFO L225 Difference]: With dead ends: 103121 [2022-11-20 10:56:52,437 INFO L226 Difference]: Without dead ends: 76479 [2022-11-20 10:56:52,550 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 10:56:52,550 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1060 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:56:52,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 1537 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 10:56:52,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76479 states. [2022-11-20 10:57:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76479 to 52930. [2022-11-20 10:57:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52930 states, 47653 states have (on average 1.5413929868004113) internal successors, (73452), 47911 states have internal predecessors, (73452), 3478 states have call successors, (3478), 1543 states have call predecessors, (3478), 1798 states have return successors, (10293), 3731 states have call predecessors, (10293), 3476 states have call successors, (10293) [2022-11-20 10:57:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52930 states to 52930 states and 87223 transitions. [2022-11-20 10:57:01,740 INFO L78 Accepts]: Start accepts. Automaton has 52930 states and 87223 transitions. Word has length 113 [2022-11-20 10:57:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:01,740 INFO L495 AbstractCegarLoop]: Abstraction has 52930 states and 87223 transitions. [2022-11-20 10:57:01,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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 10:57:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 52930 states and 87223 transitions. [2022-11-20 10:57:01,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 10:57:01,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:01,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 10:57:01,786 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash -214886707, now seen corresponding path program 1 times [2022-11-20 10:57:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:01,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406473195] [2022-11-20 10:57:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:01,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:01,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-20 10:57:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:01,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:01,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-20 10:57:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:01,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-20 10:57:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:01,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-20 10:57:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:01,977 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 10:57:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:01,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406473195] [2022-11-20 10:57:01,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406473195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:01,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:01,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:57:01,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664699156] [2022-11-20 10:57:01,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:01,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:57:01,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:01,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:57:01,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:57:01,979 INFO L87 Difference]: Start difference. First operand 52930 states and 87223 transitions. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 5 states have internal predecessors, (102), 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)