./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/relax-2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/relax-2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 11:57:14,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:57:14,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:57:15,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:57:15,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:57:15,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:57:15,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:57:15,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:57:15,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:57:15,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:57:15,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:57:15,015 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:57:15,015 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:57:15,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:57:15,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:57:15,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:57:15,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:57:15,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:57:15,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:57:15,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:57:15,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:57:15,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:57:15,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:57:15,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:57:15,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:57:15,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:57:15,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:57:15,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:57:15,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:57:15,029 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:57:15,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:57:15,030 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:57:15,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:57:15,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:57:15,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:57:15,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:57:15,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:57:15,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:57:15,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:57:15,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:57:15,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:57:15,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:57:15,050 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:57:15,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:57:15,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:57:15,051 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:57:15,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:57:15,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:57:15,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:57:15,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:57:15,052 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:57:15,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:57:15,052 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:57:15,053 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:57:15,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:57:15,054 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:57:15,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:57:15,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:57:15,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:57:15,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:57:15,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:57:15,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:57:15,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:57:15,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:57:15,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:57:15,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:57:15,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:57:15,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:57:15,056 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:57:15,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:57:15,056 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:57:15,057 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2022-12-13 11:57:15,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:57:15,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:57:15,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:57:15,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:57:15,262 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:57:15,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-examples/relax-2-2.i [2022-12-13 11:57:17,913 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:57:18,064 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:57:18,064 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/sv-benchmarks/c/array-examples/relax-2-2.i [2022-12-13 11:57:18,073 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/data/66d58cb40/687b757548fa48ecb7eea3a2beff0671/FLAG3f0af9437 [2022-12-13 11:57:18,083 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/data/66d58cb40/687b757548fa48ecb7eea3a2beff0671 [2022-12-13 11:57:18,085 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:57:18,086 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:57:18,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:57:18,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:57:18,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:57:18,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26dc6f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18, skipping insertion in model container [2022-12-13 11:57:18,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:57:18,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:57:18,231 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_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2022-12-13 11:57:18,309 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:57:18,316 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:57:18,324 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_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/sv-benchmarks/c/array-examples/relax-2-2.i[982,995] [2022-12-13 11:57:18,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:57:18,363 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:57:18,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18 WrapperNode [2022-12-13 11:57:18,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:57:18,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:57:18,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:57:18,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:57:18,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,395 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2022-12-13 11:57:18,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:57:18,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:57:18,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:57:18,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:57:18,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:57:18,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:57:18,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:57:18,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:57:18,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (1/1) ... [2022-12-13 11:57:18,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:57:18,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:18,444 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:57:18,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:57:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:57:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 11:57:18,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 11:57:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:57:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 11:57:18,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 11:57:18,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 11:57:18,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:57:18,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:57:18,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:57:18,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:57:18,568 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:57:18,569 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:57:18,778 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:57:18,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:57:18,783 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 11:57:18,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:57:18 BoogieIcfgContainer [2022-12-13 11:57:18,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:57:18,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:57:18,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:57:18,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:57:18,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:57:18" (1/3) ... [2022-12-13 11:57:18,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b128b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:57:18, skipping insertion in model container [2022-12-13 11:57:18,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:57:18" (2/3) ... [2022-12-13 11:57:18,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b128b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:57:18, skipping insertion in model container [2022-12-13 11:57:18,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:57:18" (3/3) ... [2022-12-13 11:57:18,791 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2022-12-13 11:57:18,806 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:57:18,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:57:18,843 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:57:18,848 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;@74d9dec1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:57:18,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:57:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:18,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 11:57:18,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:18,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:18,858 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:18,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash 424197970, now seen corresponding path program 1 times [2022-12-13 11:57:18,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:18,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416767057] [2022-12-13 11:57:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:18,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:18,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:19,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:19,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416767057] [2022-12-13 11:57:19,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416767057] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:19,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:19,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:57:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996527596] [2022-12-13 11:57:19,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:19,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:57:19,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:19,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:57:19,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:57:19,040 INFO L87 Difference]: Start difference. First operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:57:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:19,059 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2022-12-13 11:57:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:57:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-12-13 11:57:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:19,067 INFO L225 Difference]: With dead ends: 105 [2022-12-13 11:57:19,067 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 11:57:19,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:57:19,072 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:19,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:57:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 11:57:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-13 11:57:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2022-12-13 11:57:19,100 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2022-12-13 11:57:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:19,100 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2022-12-13 11:57:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:57:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2022-12-13 11:57:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 11:57:19,101 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:19,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:19,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:57:19,102 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:19,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:19,102 INFO L85 PathProgramCache]: Analyzing trace with hash 518459404, now seen corresponding path program 1 times [2022-12-13 11:57:19,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:19,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444422639] [2022-12-13 11:57:19,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:19,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:19,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:19,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444422639] [2022-12-13 11:57:19,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444422639] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:19,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:19,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:57:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308352177] [2022-12-13 11:57:19,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:19,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:57:19,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:57:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:57:19,276 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:19,307 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2022-12-13 11:57:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:57:19,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-12-13 11:57:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:19,308 INFO L225 Difference]: With dead ends: 83 [2022-12-13 11:57:19,308 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 11:57:19,309 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 [2022-12-13 11:57:19,309 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:19,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:57:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 11:57:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-12-13 11:57:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2022-12-13 11:57:19,316 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 24 [2022-12-13 11:57:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:19,317 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2022-12-13 11:57:19,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2022-12-13 11:57:19,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 11:57:19,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:19,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:19,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:57:19,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:19,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:19,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1090015461, now seen corresponding path program 1 times [2022-12-13 11:57:19,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:19,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719731476] [2022-12-13 11:57:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:19,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:19,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719731476] [2022-12-13 11:57:19,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719731476] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:19,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:19,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 11:57:19,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163795416] [2022-12-13 11:57:19,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:19,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:57:19,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:57:19,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:57:19,505 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:19,610 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2022-12-13 11:57:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:57:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-12-13 11:57:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:19,612 INFO L225 Difference]: With dead ends: 108 [2022-12-13 11:57:19,612 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 11:57:19,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:57:19,614 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:19,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:19,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 11:57:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-12-13 11:57:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2022-12-13 11:57:19,625 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2022-12-13 11:57:19,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:19,625 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2022-12-13 11:57:19,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:19,626 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2022-12-13 11:57:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 11:57:19,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:19,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:19,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 11:57:19,627 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:19,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1637522002, now seen corresponding path program 1 times [2022-12-13 11:57:19,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:19,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797906817] [2022-12-13 11:57:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:19,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:19,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:19,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797906817] [2022-12-13 11:57:19,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797906817] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:19,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:19,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 11:57:19,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949055853] [2022-12-13 11:57:19,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:19,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:57:19,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:57:19,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:57:19,970 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:20,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:20,180 INFO L93 Difference]: Finished difference Result 110 states and 147 transitions. [2022-12-13 11:57:20,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 11:57:20,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-12-13 11:57:20,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:20,182 INFO L225 Difference]: With dead ends: 110 [2022-12-13 11:57:20,183 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 11:57:20,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:57:20,184 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:20,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 350 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 11:57:20,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2022-12-13 11:57:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 67 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2022-12-13 11:57:20,197 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 27 [2022-12-13 11:57:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:20,197 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2022-12-13 11:57:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2022-12-13 11:57:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 11:57:20,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:20,199 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:20,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:57:20,199 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:20,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:20,200 INFO L85 PathProgramCache]: Analyzing trace with hash -703814141, now seen corresponding path program 1 times [2022-12-13 11:57:20,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:20,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720444592] [2022-12-13 11:57:20,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:20,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:20,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720444592] [2022-12-13 11:57:20,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720444592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:20,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426316438] [2022-12-13 11:57:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:20,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:20,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:20,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:20,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:57:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:57:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:20,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:20,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426316438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:20,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:57:20,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2022-12-13 11:57:20,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595060442] [2022-12-13 11:57:20,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:20,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:57:20,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:20,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:57:20,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:57:20,771 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:20,876 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2022-12-13 11:57:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:57:20,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-13 11:57:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:20,878 INFO L225 Difference]: With dead ends: 88 [2022-12-13 11:57:20,878 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 11:57:20,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:57:20,879 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:20,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 186 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 11:57:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-12-13 11:57:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.391304347826087) internal successors, (96), 70 states have internal predecessors, (96), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2022-12-13 11:57:20,893 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 28 [2022-12-13 11:57:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:20,893 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2022-12-13 11:57:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2022-12-13 11:57:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 11:57:20,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:20,895 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:20,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:21,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:21,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash 338610741, now seen corresponding path program 1 times [2022-12-13 11:57:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:21,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942618244] [2022-12-13 11:57:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:21,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:21,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:21,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942618244] [2022-12-13 11:57:21,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942618244] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:21,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:21,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:57:21,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197262090] [2022-12-13 11:57:21,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:21,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:57:21,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:21,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:57:21,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:57:21,267 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:21,288 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2022-12-13 11:57:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:57:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-12-13 11:57:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:21,289 INFO L225 Difference]: With dead ends: 97 [2022-12-13 11:57:21,289 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 11:57:21,289 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 [2022-12-13 11:57:21,290 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:21,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:57:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 11:57:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-13 11:57:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2022-12-13 11:57:21,304 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 29 [2022-12-13 11:57:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:21,304 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2022-12-13 11:57:21,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2022-12-13 11:57:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 11:57:21,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:21,305 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:21,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:57:21,306 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1088390000, now seen corresponding path program 1 times [2022-12-13 11:57:21,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:21,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569088416] [2022-12-13 11:57:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:21,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:21,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:21,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569088416] [2022-12-13 11:57:21,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569088416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:21,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:21,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:57:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957898628] [2022-12-13 11:57:21,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:21,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:57:21,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:57:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:57:21,439 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:21,517 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-12-13 11:57:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:57:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-12-13 11:57:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:21,519 INFO L225 Difference]: With dead ends: 90 [2022-12-13 11:57:21,519 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 11:57:21,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:57:21,520 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:21,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 227 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:21,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 11:57:21,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-12-13 11:57:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-12-13 11:57:21,526 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2022-12-13 11:57:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:21,526 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-12-13 11:57:21,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:21,526 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2022-12-13 11:57:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 11:57:21,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:21,526 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:21,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 11:57:21,527 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:21,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1413511858, now seen corresponding path program 1 times [2022-12-13 11:57:21,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:21,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183850616] [2022-12-13 11:57:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:21,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:21,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183850616] [2022-12-13 11:57:21,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183850616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:21,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779600403] [2022-12-13 11:57:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:21,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:21,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:21,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:57:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:21,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:57:21,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:21,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:21,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779600403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:21,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:57:21,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-12-13 11:57:21,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025954665] [2022-12-13 11:57:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:57:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:57:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-12-13 11:57:21,891 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:21,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:21,974 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2022-12-13 11:57:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:57:21,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-12-13 11:57:21,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:21,975 INFO L225 Difference]: With dead ends: 71 [2022-12-13 11:57:21,975 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 11:57:21,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:57:21,976 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:21,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 11:57:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-13 11:57:21,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:21,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2022-12-13 11:57:21,985 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 29 [2022-12-13 11:57:21,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:21,985 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2022-12-13 11:57:21,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2022-12-13 11:57:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 11:57:21,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:21,986 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:21,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:57:22,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 11:57:22,187 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:22,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1264785641, now seen corresponding path program 1 times [2022-12-13 11:57:22,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:22,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999430798] [2022-12-13 11:57:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:22,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:22,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:22,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999430798] [2022-12-13 11:57:22,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999430798] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:22,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:22,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:57:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716106953] [2022-12-13 11:57:22,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:22,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:57:22,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:22,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:57:22,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:57:22,328 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:22,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:22,355 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2022-12-13 11:57:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:57:22,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-12-13 11:57:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:22,356 INFO L225 Difference]: With dead ends: 93 [2022-12-13 11:57:22,356 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 11:57:22,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:57:22,357 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:22,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:57:22,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 11:57:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2022-12-13 11:57:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-12-13 11:57:22,366 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 31 [2022-12-13 11:57:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:22,367 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-12-13 11:57:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-12-13 11:57:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 11:57:22,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:22,367 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:22,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:57:22,368 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1196949427, now seen corresponding path program 1 times [2022-12-13 11:57:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:22,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301650518] [2022-12-13 11:57:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:22,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:22,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301650518] [2022-12-13 11:57:22,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301650518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:22,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804947927] [2022-12-13 11:57:22,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:22,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:22,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:22,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:22,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:57:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:22,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 11:57:22,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:22,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:22,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804947927] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:22,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:57:22,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2022-12-13 11:57:22,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790321015] [2022-12-13 11:57:22,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:22,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:57:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:57:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:57:22,700 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:22,792 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2022-12-13 11:57:22,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:57:22,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-13 11:57:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:22,793 INFO L225 Difference]: With dead ends: 124 [2022-12-13 11:57:22,793 INFO L226 Difference]: Without dead ends: 64 [2022-12-13 11:57:22,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:57:22,794 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 38 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:22,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 232 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-12-13 11:57:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-12-13 11:57:22,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 11:57:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2022-12-13 11:57:22,802 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2022-12-13 11:57:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:22,803 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2022-12-13 11:57:22,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2022-12-13 11:57:22,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 11:57:22,803 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:22,804 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:22,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:23,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:23,005 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666735, now seen corresponding path program 1 times [2022-12-13 11:57:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:23,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882324636] [2022-12-13 11:57:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:23,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:23,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:23,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882324636] [2022-12-13 11:57:23,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882324636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:23,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465484254] [2022-12-13 11:57:23,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:23,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:23,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:23,217 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:23,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:57:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:57:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:23,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:23,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465484254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:23,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:23,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2022-12-13 11:57:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832185997] [2022-12-13 11:57:23,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:23,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 11:57:23,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 11:57:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-12-13 11:57:23,559 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:23,764 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2022-12-13 11:57:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:57:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-12-13 11:57:23,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:23,766 INFO L225 Difference]: With dead ends: 148 [2022-12-13 11:57:23,766 INFO L226 Difference]: Without dead ends: 125 [2022-12-13 11:57:23,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:57:23,767 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:23,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 684 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:23,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-13 11:57:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2022-12-13 11:57:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2022-12-13 11:57:23,778 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 37 [2022-12-13 11:57:23,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:23,779 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2022-12-13 11:57:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2022-12-13 11:57:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 11:57:23,779 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:23,779 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:23,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:57:23,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:23,980 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:23,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:23,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1165513777, now seen corresponding path program 1 times [2022-12-13 11:57:23,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:23,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031294465] [2022-12-13 11:57:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:23,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:24,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031294465] [2022-12-13 11:57:24,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031294465] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384581371] [2022-12-13 11:57:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:24,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:24,254 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:24,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:57:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:57:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:24,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:24,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384581371] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:24,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:57:24,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2022-12-13 11:57:24,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307269051] [2022-12-13 11:57:24,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:24,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:57:24,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:57:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-13 11:57:24,361 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:24,439 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2022-12-13 11:57:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:57:24,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-12-13 11:57:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:24,440 INFO L225 Difference]: With dead ends: 127 [2022-12-13 11:57:24,441 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 11:57:24,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:57:24,442 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:24,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 11:57:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2022-12-13 11:57:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 88 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2022-12-13 11:57:24,456 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 37 [2022-12-13 11:57:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:24,457 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2022-12-13 11:57:24,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2022-12-13 11:57:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 11:57:24,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:24,458 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:24,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:57:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:57:24,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2034579695, now seen corresponding path program 1 times [2022-12-13 11:57:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:24,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035593348] [2022-12-13 11:57:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:24,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:24,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:24,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035593348] [2022-12-13 11:57:24,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035593348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:24,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384387285] [2022-12-13 11:57:24,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:24,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:24,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:24,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:57:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:57:24,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:57:24,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:25,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384387285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:25,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:25,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 18 [2022-12-13 11:57:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766357503] [2022-12-13 11:57:25,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:25,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:57:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:57:25,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:57:25,049 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:25,453 INFO L93 Difference]: Finished difference Result 269 states and 362 transitions. [2022-12-13 11:57:25,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:57:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-12-13 11:57:25,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:25,455 INFO L225 Difference]: With dead ends: 269 [2022-12-13 11:57:25,455 INFO L226 Difference]: Without dead ends: 192 [2022-12-13 11:57:25,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-12-13 11:57:25,456 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 437 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:25,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 622 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:57:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-13 11:57:25,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2022-12-13 11:57:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.3) internal successors, (143), 111 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2022-12-13 11:57:25,478 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 38 [2022-12-13 11:57:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:25,478 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2022-12-13 11:57:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2022-12-13 11:57:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 11:57:25,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:25,479 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:25,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:57:25,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:57:25,681 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:25,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:25,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922323, now seen corresponding path program 1 times [2022-12-13 11:57:25,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:25,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979203975] [2022-12-13 11:57:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:25,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:25,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:25,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-12-13 11:57:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:25,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:25,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979203975] [2022-12-13 11:57:25,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979203975] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131240903] [2022-12-13 11:57:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:25,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:25,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:25,898 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:25,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:57:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:25,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:57:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:26,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:57:26,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:26,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131240903] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:26,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:57:26,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2022-12-13 11:57:26,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825426554] [2022-12-13 11:57:26,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:26,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:57:26,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:26,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:57:26,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:57:26,061 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:57:26,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:26,185 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2022-12-13 11:57:26,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:57:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 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 42 [2022-12-13 11:57:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:26,187 INFO L225 Difference]: With dead ends: 167 [2022-12-13 11:57:26,187 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 11:57:26,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:57:26,188 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:26,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 138 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 11:57:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-12-13 11:57:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 113 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2022-12-13 11:57:26,209 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 42 [2022-12-13 11:57:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:26,209 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2022-12-13 11:57:26,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 11:57:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2022-12-13 11:57:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 11:57:26,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:26,210 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:26,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:57:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 11:57:26,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:26,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1093284825, now seen corresponding path program 1 times [2022-12-13 11:57:26,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023771970] [2022-12-13 11:57:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:26,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:26,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:26,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023771970] [2022-12-13 11:57:26,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023771970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:26,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462108171] [2022-12-13 11:57:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:26,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:26,561 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:26,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:57:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:26,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:57:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:26,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 11:57:26,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462108171] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:26,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:26,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2022-12-13 11:57:26,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756126799] [2022-12-13 11:57:26,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:26,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 11:57:26,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:26,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 11:57:26,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-13 11:57:26,909 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:27,902 INFO L93 Difference]: Finished difference Result 350 states and 484 transitions. [2022-12-13 11:57:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 11:57:27,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-12-13 11:57:27,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:27,904 INFO L225 Difference]: With dead ends: 350 [2022-12-13 11:57:27,904 INFO L226 Difference]: Without dead ends: 320 [2022-12-13 11:57:27,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 11:57:27,905 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 534 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:27,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1260 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:57:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-13 11:57:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 166. [2022-12-13 11:57:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 155 states have internal predecessors, (205), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2022-12-13 11:57:27,924 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 42 [2022-12-13 11:57:27,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:27,924 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2022-12-13 11:57:27,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:27,925 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2022-12-13 11:57:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 11:57:27,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:27,925 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:27,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:57:28,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 11:57:28,126 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1902631451, now seen corresponding path program 1 times [2022-12-13 11:57:28,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:28,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726033064] [2022-12-13 11:57:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:28,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:28,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:28,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:28,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726033064] [2022-12-13 11:57:28,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726033064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298647302] [2022-12-13 11:57:28,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:28,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:28,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:28,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:28,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:57:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:28,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 11:57:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:28,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 11:57:29,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:57:29,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:57:29,014 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-13 11:57:29,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-12-13 11:57:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:57:29,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:29,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:29,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298647302] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:29,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:57:29,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 17] total 31 [2022-12-13 11:57:29,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725158464] [2022-12-13 11:57:29,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:29,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:57:29,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:29,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:57:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:57:29,299 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:29,778 INFO L93 Difference]: Finished difference Result 297 states and 404 transitions. [2022-12-13 11:57:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:57:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-12-13 11:57:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:29,780 INFO L225 Difference]: With dead ends: 297 [2022-12-13 11:57:29,780 INFO L226 Difference]: Without dead ends: 288 [2022-12-13 11:57:29,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 11:57:29,782 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 117 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:29,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 676 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:57:29,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-12-13 11:57:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 207. [2022-12-13 11:57:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 195 states have (on average 1.353846153846154) internal successors, (264), 196 states have internal predecessors, (264), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 279 transitions. [2022-12-13 11:57:29,809 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 279 transitions. Word has length 42 [2022-12-13 11:57:29,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:29,809 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 279 transitions. [2022-12-13 11:57:29,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 279 transitions. [2022-12-13 11:57:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 11:57:29,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:29,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:29,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:57:30,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 11:57:30,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1797758865, now seen corresponding path program 1 times [2022-12-13 11:57:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:30,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250815252] [2022-12-13 11:57:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:30,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:30,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:30,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:30,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250815252] [2022-12-13 11:57:30,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250815252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:30,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943598789] [2022-12-13 11:57:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:30,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:30,214 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:30,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:57:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:30,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:30,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943598789] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:30,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:30,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-12-13 11:57:30,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363070530] [2022-12-13 11:57:30,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:30,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:57:30,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:57:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:57:30,437 INFO L87 Difference]: Start difference. First operand 207 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:30,696 INFO L93 Difference]: Finished difference Result 258 states and 342 transitions. [2022-12-13 11:57:30,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 11:57:30,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-12-13 11:57:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:30,698 INFO L225 Difference]: With dead ends: 258 [2022-12-13 11:57:30,698 INFO L226 Difference]: Without dead ends: 182 [2022-12-13 11:57:30,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:57:30,698 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 173 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:30,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 648 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:57:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-13 11:57:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2022-12-13 11:57:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.321917808219178) internal successors, (193), 147 states have internal predecessors, (193), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2022-12-13 11:57:30,718 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 43 [2022-12-13 11:57:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:30,718 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2022-12-13 11:57:30,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2022-12-13 11:57:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 11:57:30,719 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:30,719 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:30,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:57:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 11:57:30,920 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash -2052626821, now seen corresponding path program 1 times [2022-12-13 11:57:30,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:30,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28472888] [2022-12-13 11:57:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:30,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:31,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 11:57:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:57:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:31,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28472888] [2022-12-13 11:57:31,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28472888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:31,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146656058] [2022-12-13 11:57:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:31,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:31,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:31,067 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:31,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:57:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:57:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:31,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:57:31,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146656058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:31,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 11:57:31,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2022-12-13 11:57:31,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374847785] [2022-12-13 11:57:31,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:31,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:57:31,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:57:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:57:31,148 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:57:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:31,204 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2022-12-13 11:57:31,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:57:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-12-13 11:57:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:31,205 INFO L225 Difference]: With dead ends: 188 [2022-12-13 11:57:31,206 INFO L226 Difference]: Without dead ends: 167 [2022-12-13 11:57:31,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 11:57:31,206 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:31,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:57:31,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-13 11:57:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2022-12-13 11:57:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 151 states have internal predecessors, (199), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2022-12-13 11:57:31,240 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 45 [2022-12-13 11:57:31,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:31,240 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2022-12-13 11:57:31,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:57:31,240 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2022-12-13 11:57:31,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 11:57:31,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:31,241 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 11:57:31,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:57:31,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 11:57:31,442 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:31,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1015993583, now seen corresponding path program 2 times [2022-12-13 11:57:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:31,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698078811] [2022-12-13 11:57:31,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:31,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:31,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698078811] [2022-12-13 11:57:31,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698078811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:31,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956344785] [2022-12-13 11:57:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:57:31,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:31,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:31,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:57:31,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:57:31,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:57:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:57:32,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:57:32,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956344785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:32,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:32,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 24 [2022-12-13 11:57:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485407433] [2022-12-13 11:57:32,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:57:32,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:57:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:57:32,194 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:33,732 INFO L93 Difference]: Finished difference Result 661 states and 912 transitions. [2022-12-13 11:57:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 11:57:33,733 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-12-13 11:57:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:33,734 INFO L225 Difference]: With dead ends: 661 [2022-12-13 11:57:33,734 INFO L226 Difference]: Without dead ends: 551 [2022-12-13 11:57:33,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=584, Invalid=2608, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 11:57:33,735 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 768 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:33,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1346 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:57:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-13 11:57:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 236. [2022-12-13 11:57:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.34375) internal successors, (301), 225 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2022-12-13 11:57:33,772 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 45 [2022-12-13 11:57:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2022-12-13 11:57:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2022-12-13 11:57:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 11:57:33,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:33,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:33,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:57:33,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:33,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1957197463, now seen corresponding path program 1 times [2022-12-13 11:57:33,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:33,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939777109] [2022-12-13 11:57:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:33,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:34,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:34,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 11:57:34,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:34,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939777109] [2022-12-13 11:57:34,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939777109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:34,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110442095] [2022-12-13 11:57:34,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:34,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:34,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:34,698 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:34,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:57:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:34,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 11:57:34,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:35,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:35,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:57:35,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:57:35,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:57:35,174 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:57:35,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 42 [2022-12-13 11:57:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:35,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:35,399 INFO L321 Elim1Store]: treesize reduction 17, result has 83.0 percent of original size [2022-12-13 11:57:35,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 90 [2022-12-13 11:57:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 11:57:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110442095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:35,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:35,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 33 [2022-12-13 11:57:35,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803223843] [2022-12-13 11:57:35,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:35,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 11:57:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 11:57:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:57:35,844 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:37,717 INFO L93 Difference]: Finished difference Result 587 states and 796 transitions. [2022-12-13 11:57:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 11:57:37,718 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-12-13 11:57:37,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:37,719 INFO L225 Difference]: With dead ends: 587 [2022-12-13 11:57:37,719 INFO L226 Difference]: Without dead ends: 455 [2022-12-13 11:57:37,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 11:57:37,720 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 383 mSDsluCounter, 1841 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:37,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1966 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 11:57:37,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-12-13 11:57:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 260. [2022-12-13 11:57:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 248 states have (on average 1.3346774193548387) internal successors, (331), 249 states have internal predecessors, (331), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 346 transitions. [2022-12-13 11:57:37,769 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 346 transitions. Word has length 48 [2022-12-13 11:57:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:37,769 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 346 transitions. [2022-12-13 11:57:37,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 346 transitions. [2022-12-13 11:57:37,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 11:57:37,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:37,769 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] [2022-12-13 11:57:37,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 11:57:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:37,971 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:37,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1256132885, now seen corresponding path program 1 times [2022-12-13 11:57:37,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:37,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236705945] [2022-12-13 11:57:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:37,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:38,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:38,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236705945] [2022-12-13 11:57:38,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236705945] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923500730] [2022-12-13 11:57:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:38,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:38,691 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:38,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 11:57:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:38,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 11:57:38,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:57:38,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:57:38,944 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-12-13 11:57:38,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 39 [2022-12-13 11:57:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:57:38,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:39,126 INFO L321 Elim1Store]: treesize reduction 15, result has 84.2 percent of original size [2022-12-13 11:57:39,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-12-13 11:57:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:39,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923500730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:39,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:39,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2022-12-13 11:57:39,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238649563] [2022-12-13 11:57:39,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:39,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 11:57:39,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:39,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 11:57:39,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-12-13 11:57:39,302 INFO L87 Difference]: Start difference. First operand 260 states and 346 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:39,895 INFO L93 Difference]: Finished difference Result 487 states and 655 transitions. [2022-12-13 11:57:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:57:39,895 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-12-13 11:57:39,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:39,898 INFO L225 Difference]: With dead ends: 487 [2022-12-13 11:57:39,898 INFO L226 Difference]: Without dead ends: 355 [2022-12-13 11:57:39,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 11:57:39,899 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 244 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:39,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 982 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:57:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-12-13 11:57:39,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 243. [2022-12-13 11:57:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 231 states have (on average 1.303030303030303) internal successors, (301), 232 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:39,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 316 transitions. [2022-12-13 11:57:39,944 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 316 transitions. Word has length 48 [2022-12-13 11:57:39,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:39,944 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 316 transitions. [2022-12-13 11:57:39,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:39,944 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 316 transitions. [2022-12-13 11:57:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 11:57:39,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:39,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:39,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:40,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 11:57:40,146 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:40,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1737037141, now seen corresponding path program 1 times [2022-12-13 11:57:40,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:40,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960197396] [2022-12-13 11:57:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:40,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 11:57:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 11:57:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:40,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960197396] [2022-12-13 11:57:40,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960197396] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:57:40,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:57:40,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:57:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958398124] [2022-12-13 11:57:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:57:40,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:57:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:57:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:57:40,216 INFO L87 Difference]: Start difference. First operand 243 states and 316 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:57:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:40,285 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2022-12-13 11:57:40,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:57:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2022-12-13 11:57:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:40,287 INFO L225 Difference]: With dead ends: 266 [2022-12-13 11:57:40,287 INFO L226 Difference]: Without dead ends: 244 [2022-12-13 11:57:40,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:57:40,288 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:40,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 117 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:57:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-13 11:57:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2022-12-13 11:57:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 231 states have internal predecessors, (298), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:40,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 313 transitions. [2022-12-13 11:57:40,332 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 313 transitions. Word has length 50 [2022-12-13 11:57:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:40,332 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 313 transitions. [2022-12-13 11:57:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:57:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 313 transitions. [2022-12-13 11:57:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 11:57:40,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:40,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:40,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 11:57:40,333 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:40,333 INFO L85 PathProgramCache]: Analyzing trace with hash -23820843, now seen corresponding path program 1 times [2022-12-13 11:57:40,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:40,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822526877] [2022-12-13 11:57:40,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:40,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 11:57:40,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:40,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822526877] [2022-12-13 11:57:40,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822526877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:40,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850662831] [2022-12-13 11:57:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:40,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:40,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:40,496 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:40,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 11:57:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:57:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:40,723 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:57:40,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 11:57:40,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850662831] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:40,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:40,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-12-13 11:57:40,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568140360] [2022-12-13 11:57:40,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:57:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:57:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:57:40,939 INFO L87 Difference]: Start difference. First operand 242 states and 313 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:43,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:43,285 INFO L93 Difference]: Finished difference Result 689 states and 913 transitions. [2022-12-13 11:57:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 11:57:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-12-13 11:57:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:43,289 INFO L225 Difference]: With dead ends: 689 [2022-12-13 11:57:43,290 INFO L226 Difference]: Without dead ends: 681 [2022-12-13 11:57:43,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 11:57:43,291 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 1733 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:43,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 1788 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 11:57:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-12-13 11:57:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 245. [2022-12-13 11:57:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 234 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 316 transitions. [2022-12-13 11:57:43,367 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 316 transitions. Word has length 49 [2022-12-13 11:57:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:43,367 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 316 transitions. [2022-12-13 11:57:43,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 316 transitions. [2022-12-13 11:57:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 11:57:43,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:43,369 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-13 11:57:43,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 11:57:43,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 11:57:43,569 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:43,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:43,569 INFO L85 PathProgramCache]: Analyzing trace with hash -319274875, now seen corresponding path program 1 times [2022-12-13 11:57:43,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:43,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102101392] [2022-12-13 11:57:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:43,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:43,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:43,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 11:57:43,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102101392] [2022-12-13 11:57:43,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102101392] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:43,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615114378] [2022-12-13 11:57:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:43,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:43,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:43,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:43,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 11:57:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 11:57:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:44,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 11:57:44,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615114378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:44,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:44,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2022-12-13 11:57:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344545818] [2022-12-13 11:57:44,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:44,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:57:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:57:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:57:44,169 INFO L87 Difference]: Start difference. First operand 245 states and 316 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:45,396 INFO L93 Difference]: Finished difference Result 727 states and 955 transitions. [2022-12-13 11:57:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 11:57:45,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-12-13 11:57:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:45,398 INFO L225 Difference]: With dead ends: 727 [2022-12-13 11:57:45,398 INFO L226 Difference]: Without dead ends: 565 [2022-12-13 11:57:45,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 11:57:45,399 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 1071 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:45,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1564 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:57:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-12-13 11:57:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 273. [2022-12-13 11:57:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 262 states have internal predecessors, (340), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 355 transitions. [2022-12-13 11:57:45,471 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 355 transitions. Word has length 51 [2022-12-13 11:57:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:45,471 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 355 transitions. [2022-12-13 11:57:45,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 355 transitions. [2022-12-13 11:57:45,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 11:57:45,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:45,472 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:45,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 11:57:45,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 11:57:45,674 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash -175162644, now seen corresponding path program 1 times [2022-12-13 11:57:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:45,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483360013] [2022-12-13 11:57:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:45,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-12-13 11:57:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-12-13 11:57:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:57:45,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:45,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483360013] [2022-12-13 11:57:45,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483360013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:45,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749546502] [2022-12-13 11:57:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:45,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:45,827 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:45,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 11:57:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 11:57:45,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:45,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:46,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749546502] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:46,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:46,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 11:57:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176020317] [2022-12-13 11:57:46,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:46,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 11:57:46,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 11:57:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-13 11:57:46,019 INFO L87 Difference]: Start difference. First operand 273 states and 355 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-13 11:57:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:46,354 INFO L93 Difference]: Finished difference Result 331 states and 427 transitions. [2022-12-13 11:57:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:57:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2022-12-13 11:57:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:46,356 INFO L225 Difference]: With dead ends: 331 [2022-12-13 11:57:46,356 INFO L226 Difference]: Without dead ends: 281 [2022-12-13 11:57:46,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:57:46,357 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:46,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 677 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:57:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-12-13 11:57:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2022-12-13 11:57:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 258 states have (on average 1.302325581395349) internal successors, (336), 259 states have internal predecessors, (336), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 11:57:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2022-12-13 11:57:46,424 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 54 [2022-12-13 11:57:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:46,424 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2022-12-13 11:57:46,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-13 11:57:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2022-12-13 11:57:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 11:57:46,425 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:46,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 11:57:46,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 11:57:46,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:46,626 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1379742433, now seen corresponding path program 2 times [2022-12-13 11:57:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:46,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926316680] [2022-12-13 11:57:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:46,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:47,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:47,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:57:47,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:47,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926316680] [2022-12-13 11:57:47,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926316680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200614525] [2022-12-13 11:57:47,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:57:47,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:47,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:47,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:47,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 11:57:47,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:57:47,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 11:57:47,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:47,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:57:47,856 INFO L321 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2022-12-13 11:57:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 70 [2022-12-13 11:57:47,885 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:57:47,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:57:48,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200614525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:48,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:48,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 40 [2022-12-13 11:57:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028725086] [2022-12-13 11:57:48,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:48,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:57:48,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:57:48,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 11:57:48,353 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:57:49,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:49,783 INFO L93 Difference]: Finished difference Result 574 states and 769 transitions. [2022-12-13 11:57:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:57:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2022-12-13 11:57:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:49,784 INFO L225 Difference]: With dead ends: 574 [2022-12-13 11:57:49,784 INFO L226 Difference]: Without dead ends: 513 [2022-12-13 11:57:49,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 11:57:49,785 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 377 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:49,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1640 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 11:57:49,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-12-13 11:57:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2022-12-13 11:57:49,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.3097643097643097) internal successors, (389), 298 states have internal predecessors, (389), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 11:57:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 406 transitions. [2022-12-13 11:57:49,868 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 406 transitions. Word has length 52 [2022-12-13 11:57:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:49,868 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 406 transitions. [2022-12-13 11:57:49,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:57:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 406 transitions. [2022-12-13 11:57:49,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 11:57:49,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:49,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 11:57:49,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 11:57:50,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 11:57:50,070 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1170436455, now seen corresponding path program 2 times [2022-12-13 11:57:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:50,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857803064] [2022-12-13 11:57:50,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:50,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:50,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:50,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 11:57:50,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857803064] [2022-12-13 11:57:50,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857803064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:50,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480100932] [2022-12-13 11:57:50,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:57:50,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:50,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:50,358 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:50,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 11:57:50,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:57:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:50,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 11:57:50,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 11:57:50,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 11:57:50,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480100932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:50,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:50,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-12-13 11:57:50,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644721326] [2022-12-13 11:57:50,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:50,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:57:50,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:57:50,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:57:50,718 INFO L87 Difference]: Start difference. First operand 310 states and 406 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:51,268 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2022-12-13 11:57:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 11:57:51,268 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-12-13 11:57:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:51,269 INFO L225 Difference]: With dead ends: 424 [2022-12-13 11:57:51,269 INFO L226 Difference]: Without dead ends: 329 [2022-12-13 11:57:51,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2022-12-13 11:57:51,270 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 406 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:51,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 965 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:57:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-13 11:57:51,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 252. [2022-12-13 11:57:51,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 239 states have (on average 1.292887029288703) internal successors, (309), 240 states have internal predecessors, (309), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 11:57:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 326 transitions. [2022-12-13 11:57:51,372 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 326 transitions. Word has length 53 [2022-12-13 11:57:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:51,373 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 326 transitions. [2022-12-13 11:57:51,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 326 transitions. [2022-12-13 11:57:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 11:57:51,374 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:51,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-12-13 11:57:51,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 11:57:51,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:51,574 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:51,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash -610707989, now seen corresponding path program 3 times [2022-12-13 11:57:51,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:51,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197623259] [2022-12-13 11:57:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:51,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:57:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197623259] [2022-12-13 11:57:51,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197623259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880749419] [2022-12-13 11:57:51,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:57:51,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:51,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:51,732 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:51,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 11:57:52,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 11:57:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:52,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:52,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880749419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:52,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:52,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-12-13 11:57:52,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109957638] [2022-12-13 11:57:52,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:52,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 11:57:52,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:52,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 11:57:52,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-12-13 11:57:52,310 INFO L87 Difference]: Start difference. First operand 252 states and 326 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:52,768 INFO L93 Difference]: Finished difference Result 301 states and 385 transitions. [2022-12-13 11:57:52,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 11:57:52,768 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-12-13 11:57:52,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:52,769 INFO L225 Difference]: With dead ends: 301 [2022-12-13 11:57:52,769 INFO L226 Difference]: Without dead ends: 267 [2022-12-13 11:57:52,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-12-13 11:57:52,769 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 113 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:52,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 985 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:57:52,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-13 11:57:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2022-12-13 11:57:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 222 states have internal predecessors, (285), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 11:57:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2022-12-13 11:57:52,829 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 54 [2022-12-13 11:57:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:52,829 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2022-12-13 11:57:52,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2022-12-13 11:57:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 11:57:52,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:52,830 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 11:57:52,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 11:57:53,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 11:57:53,031 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1409986660, now seen corresponding path program 1 times [2022-12-13 11:57:53,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:53,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724101721] [2022-12-13 11:57:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:53,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:53,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-12-13 11:57:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 11:57:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:57:53,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724101721] [2022-12-13 11:57:53,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724101721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721120245] [2022-12-13 11:57:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:53,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:53,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:53,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 11:57:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:53,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:57:53,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:57:53,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:57:53,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721120245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:53,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:53,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2022-12-13 11:57:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115205140] [2022-12-13 11:57:53,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:53,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:57:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:57:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:57:53,398 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 11:57:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:53,805 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2022-12-13 11:57:53,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 11:57:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2022-12-13 11:57:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:53,807 INFO L225 Difference]: With dead ends: 324 [2022-12-13 11:57:53,807 INFO L226 Difference]: Without dead ends: 258 [2022-12-13 11:57:53,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:57:53,808 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:53,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 600 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 11:57:53,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-13 11:57:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2022-12-13 11:57:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.2830188679245282) internal successors, (272), 213 states have internal predecessors, (272), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2022-12-13 11:57:53,866 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 57 [2022-12-13 11:57:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:53,866 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2022-12-13 11:57:53,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 11:57:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2022-12-13 11:57:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 11:57:53,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:53,866 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:53,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 11:57:54,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 11:57:54,068 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:54,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1004480119, now seen corresponding path program 3 times [2022-12-13 11:57:54,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013365775] [2022-12-13 11:57:54,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:54,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:54,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 11:57:54,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:54,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013365775] [2022-12-13 11:57:54,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013365775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:54,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551882570] [2022-12-13 11:57:54,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:57:54,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:54,462 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:54,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 11:57:54,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 11:57:54,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:57:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:57:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:57:54,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:57:54,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551882570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:54,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:54,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-12-13 11:57:54,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983779403] [2022-12-13 11:57:54,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:54,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:57:54,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:57:54,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:57:54,928 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:57:58,289 INFO L93 Difference]: Finished difference Result 1047 states and 1365 transitions. [2022-12-13 11:57:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 11:57:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-12-13 11:57:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:57:58,291 INFO L225 Difference]: With dead ends: 1047 [2022-12-13 11:57:58,291 INFO L226 Difference]: Without dead ends: 890 [2022-12-13 11:57:58,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1157, Invalid=7399, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 11:57:58,293 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1843 mSDsluCounter, 2586 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1843 SdHoareTripleChecker+Valid, 2802 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:57:58,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1843 Valid, 2802 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 11:57:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-12-13 11:57:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 209. [2022-12-13 11:57:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 197 states have (on average 1.284263959390863) internal successors, (253), 198 states have internal predecessors, (253), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 11:57:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 268 transitions. [2022-12-13 11:57:58,362 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 268 transitions. Word has length 55 [2022-12-13 11:57:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:57:58,362 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 268 transitions. [2022-12-13 11:57:58,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:57:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 268 transitions. [2022-12-13 11:57:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 11:57:58,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:57:58,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:57:58,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 11:57:58,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:58,563 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:57:58,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:57:58,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1373602884, now seen corresponding path program 1 times [2022-12-13 11:57:58,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:57:58,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278264960] [2022-12-13 11:57:58,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:58,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:57:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:59,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:57:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:59,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:57:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:59,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-12-13 11:57:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:59,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 11:57:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 11:57:59,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:57:59,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278264960] [2022-12-13 11:57:59,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278264960] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:57:59,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688693354] [2022-12-13 11:57:59,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:57:59,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:57:59,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:57:59,096 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:57:59,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 11:57:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:57:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:57:59,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:57:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:57:59,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:57:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 11:57:59,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688693354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:57:59,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:57:59,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 31 [2022-12-13 11:57:59,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48524708] [2022-12-13 11:57:59,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:57:59,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:57:59,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:57:59,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:57:59,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:57:59,569 INFO L87 Difference]: Start difference. First operand 209 states and 268 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:58:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:58:02,603 INFO L93 Difference]: Finished difference Result 418 states and 535 transitions. [2022-12-13 11:58:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-13 11:58:02,604 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-12-13 11:58:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:58:02,605 INFO L225 Difference]: With dead ends: 418 [2022-12-13 11:58:02,605 INFO L226 Difference]: Without dead ends: 311 [2022-12-13 11:58:02,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=949, Invalid=4453, Unknown=0, NotChecked=0, Total=5402 [2022-12-13 11:58:02,606 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 785 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:58:02,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 850 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 11:58:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-12-13 11:58:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2022-12-13 11:58:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 215 states have internal predecessors, (268), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 11:58:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2022-12-13 11:58:02,688 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 59 [2022-12-13 11:58:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:58:02,688 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2022-12-13 11:58:02,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:58:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2022-12-13 11:58:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 11:58:02,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:58:02,689 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:02,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 11:58:02,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 11:58:02,891 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:58:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:02,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1737992177, now seen corresponding path program 4 times [2022-12-13 11:58:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:02,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373663344] [2022-12-13 11:58:02,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:02,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:03,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:58:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:03,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:58:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 11:58:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373663344] [2022-12-13 11:58:03,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373663344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:03,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079402178] [2022-12-13 11:58:03,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:58:03,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:03,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:03,713 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:03,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 11:58:03,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:58:03,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:03,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 11:58:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:04,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:58:04,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:58:04,164 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:58:04,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2022-12-13 11:58:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 11:58:04,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:04,638 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 11:58:04,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 11:58:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:58:05,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079402178] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:58:05,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:58:05,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 40 [2022-12-13 11:58:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132439673] [2022-12-13 11:58:05,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:58:05,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 11:58:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:58:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 11:58:05,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 11:58:05,287 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:58:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:58:07,689 INFO L93 Difference]: Finished difference Result 436 states and 558 transitions. [2022-12-13 11:58:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 11:58:07,689 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-12-13 11:58:07,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:58:07,692 INFO L225 Difference]: With dead ends: 436 [2022-12-13 11:58:07,692 INFO L226 Difference]: Without dead ends: 412 [2022-12-13 11:58:07,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2022-12-13 11:58:07,694 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 596 mSDsluCounter, 1721 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:58:07,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1828 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 11:58:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-12-13 11:58:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 241. [2022-12-13 11:58:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 226 states have (on average 1.252212389380531) internal successors, (283), 227 states have internal predecessors, (283), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 11:58:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2022-12-13 11:58:07,783 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 58 [2022-12-13 11:58:07,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:58:07,784 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2022-12-13 11:58:07,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:58:07,784 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2022-12-13 11:58:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 11:58:07,784 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:58:07,784 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:58:07,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 11:58:07,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 11:58:07,985 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:58:07,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:58:07,987 INFO L85 PathProgramCache]: Analyzing trace with hash 162150685, now seen corresponding path program 5 times [2022-12-13 11:58:07,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:58:07,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478210681] [2022-12-13 11:58:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:58:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:58:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:08,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:58:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:08,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:58:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:58:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 11:58:08,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:58:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478210681] [2022-12-13 11:58:08,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478210681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:58:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353933160] [2022-12-13 11:58:08,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:58:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:58:08,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:58:08,856 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:58:08,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 11:58:09,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 11:58:09,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:58:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 93 conjunts are in the unsatisfiable core [2022-12-13 11:58:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:58:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 11:58:10,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:58:12,943 INFO L321 Elim1Store]: treesize reduction 73, result has 86.7 percent of original size [2022-12-13 11:58:12,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 104 treesize of output 496 [2022-12-13 11:59:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:59:08,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353933160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:08,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:08,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 25] total 56 [2022-12-13 11:59:08,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887721932] [2022-12-13 11:59:08,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:08,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 11:59:08,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 11:59:08,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2676, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 11:59:08,365 INFO L87 Difference]: Start difference. First operand 241 states and 304 transitions. Second operand has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:59:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:18,694 INFO L93 Difference]: Finished difference Result 611 states and 786 transitions. [2022-12-13 11:59:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-12-13 11:59:18,695 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-12-13 11:59:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:18,698 INFO L225 Difference]: With dead ends: 611 [2022-12-13 11:59:18,698 INFO L226 Difference]: Without dead ends: 504 [2022-12-13 11:59:18,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3971 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2000, Invalid=12520, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 11:59:18,701 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 813 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:18,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1850 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-13 11:59:18,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-12-13 11:59:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 261. [2022-12-13 11:59:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 246 states have (on average 1.2520325203252032) internal successors, (308), 247 states have internal predecessors, (308), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 11:59:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 329 transitions. [2022-12-13 11:59:18,819 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 329 transitions. Word has length 58 [2022-12-13 11:59:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:18,819 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 329 transitions. [2022-12-13 11:59:18,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9107142857142858) internal successors, (107), 55 states have internal predecessors, (107), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:59:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 329 transitions. [2022-12-13 11:59:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 11:59:18,820 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:18,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:18,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 11:59:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:19,021 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:19,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1550031143, now seen corresponding path program 6 times [2022-12-13 11:59:19,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292821562] [2022-12-13 11:59:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:19,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:19,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-13 11:59:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292821562] [2022-12-13 11:59:19,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292821562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247468738] [2022-12-13 11:59:19,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 11:59:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:19,892 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:19,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 11:59:20,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 11:59:20,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:20,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 11:59:20,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:59:20,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 11:59:20,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:20,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 39 [2022-12-13 11:59:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:59:20,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:21,061 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 11:59:21,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 11:59:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 11:59:21,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247468738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:21,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:21,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 41 [2022-12-13 11:59:21,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804769031] [2022-12-13 11:59:21,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:21,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 11:59:21,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:21,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 11:59:21,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1482, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 11:59:21,723 INFO L87 Difference]: Start difference. First operand 261 states and 329 transitions. Second operand has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:59:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:24,354 INFO L93 Difference]: Finished difference Result 469 states and 598 transitions. [2022-12-13 11:59:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 11:59:24,355 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 58 [2022-12-13 11:59:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:24,356 INFO L225 Difference]: With dead ends: 469 [2022-12-13 11:59:24,356 INFO L226 Difference]: Without dead ends: 443 [2022-12-13 11:59:24,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=514, Invalid=3908, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 11:59:24,357 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 446 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:24,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 2095 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 11:59:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-12-13 11:59:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 254. [2022-12-13 11:59:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.2510460251046025) internal successors, (299), 240 states have internal predecessors, (299), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 11:59:24,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 320 transitions. [2022-12-13 11:59:24,467 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 320 transitions. Word has length 58 [2022-12-13 11:59:24,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:24,467 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 320 transitions. [2022-12-13 11:59:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 11:59:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 320 transitions. [2022-12-13 11:59:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 11:59:24,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:24,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 11:59:24,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 11:59:24,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:24,670 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1948639156, now seen corresponding path program 2 times [2022-12-13 11:59:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:24,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346522196] [2022-12-13 11:59:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:24,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:25,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:25,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:25,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 11:59:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-12-13 11:59:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:59:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346522196] [2022-12-13 11:59:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346522196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920409288] [2022-12-13 11:59:25,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:59:25,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:25,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:25,188 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:25,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 11:59:25,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:59:25,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:25,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 11:59:25,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:25,394 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 11:59:25,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2022-12-13 11:59:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 11:59:25,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:25,501 INFO L321 Elim1Store]: treesize reduction 19, result has 80.0 percent of original size [2022-12-13 11:59:25,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 83 [2022-12-13 11:59:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 11:59:25,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920409288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:25,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:25,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 10] total 23 [2022-12-13 11:59:25,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055362990] [2022-12-13 11:59:25,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:25,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 11:59:25,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:25,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 11:59:25,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-12-13 11:59:25,677 INFO L87 Difference]: Start difference. First operand 254 states and 320 transitions. Second operand has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:59:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:26,315 INFO L93 Difference]: Finished difference Result 407 states and 517 transitions. [2022-12-13 11:59:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:59:26,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 62 [2022-12-13 11:59:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:26,316 INFO L225 Difference]: With dead ends: 407 [2022-12-13 11:59:26,316 INFO L226 Difference]: Without dead ends: 343 [2022-12-13 11:59:26,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-12-13 11:59:26,317 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 153 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:26,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 785 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:59:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-12-13 11:59:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 258. [2022-12-13 11:59:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 242 states have (on average 1.2396694214876034) internal successors, (300), 243 states have internal predecessors, (300), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 11:59:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 323 transitions. [2022-12-13 11:59:26,428 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 323 transitions. Word has length 62 [2022-12-13 11:59:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:26,428 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 323 transitions. [2022-12-13 11:59:26,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.05) internal successors, (81), 23 states have internal predecessors, (81), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 11:59:26,429 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 323 transitions. [2022-12-13 11:59:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 11:59:26,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:26,429 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 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] [2022-12-13 11:59:26,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 11:59:26,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 11:59:26,630 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -158527231, now seen corresponding path program 2 times [2022-12-13 11:59:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:26,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056451152] [2022-12-13 11:59:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:26,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:26,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:26,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-13 11:59:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:26,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056451152] [2022-12-13 11:59:26,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056451152] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:26,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218869313] [2022-12-13 11:59:26,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:59:26,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:26,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:26,784 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:26,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 11:59:26,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:59:26,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:59:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:59:27,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:59:27,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218869313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:27,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:27,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-12-13 11:59:27,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864527573] [2022-12-13 11:59:27,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:27,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 11:59:27,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 11:59:27,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-12-13 11:59:27,260 INFO L87 Difference]: Start difference. First operand 258 states and 323 transitions. Second operand has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:59:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:31,296 INFO L93 Difference]: Finished difference Result 815 states and 1047 transitions. [2022-12-13 11:59:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 11:59:31,296 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-12-13 11:59:31,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:31,297 INFO L225 Difference]: With dead ends: 815 [2022-12-13 11:59:31,297 INFO L226 Difference]: Without dead ends: 608 [2022-12-13 11:59:31,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=949, Invalid=7423, Unknown=0, NotChecked=0, Total=8372 [2022-12-13 11:59:31,299 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 492 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 2037 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:31,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 2037 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 11:59:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-12-13 11:59:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 485. [2022-12-13 11:59:31,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 469 states have (on average 1.2537313432835822) internal successors, (588), 470 states have internal predecessors, (588), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 11:59:31,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 611 transitions. [2022-12-13 11:59:31,478 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 611 transitions. Word has length 60 [2022-12-13 11:59:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:31,479 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 611 transitions. [2022-12-13 11:59:31,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.066666666666666) internal successors, (122), 30 states have internal predecessors, (122), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:59:31,479 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 611 transitions. [2022-12-13 11:59:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 11:59:31,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:31,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-12-13 11:59:31,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 11:59:31,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 11:59:31,681 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1380776590, now seen corresponding path program 1 times [2022-12-13 11:59:31,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:31,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194698179] [2022-12-13 11:59:31,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:31,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:31,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 11:59:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 11:59:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 11:59:32,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:32,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194698179] [2022-12-13 11:59:32,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194698179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:32,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137896268] [2022-12-13 11:59:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:32,279 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:32,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 11:59:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 11:59:32,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:32,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 11:59:32,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 10 [2022-12-13 11:59:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 11:59:32,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:33,253 INFO L321 Elim1Store]: treesize reduction 19, result has 81.0 percent of original size [2022-12-13 11:59:33,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 88 [2022-12-13 11:59:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-13 11:59:33,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137896268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:33,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:33,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 16] total 39 [2022-12-13 11:59:33,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644270822] [2022-12-13 11:59:33,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:33,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 11:59:33,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:33,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 11:59:33,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 11:59:33,976 INFO L87 Difference]: Start difference. First operand 485 states and 611 transitions. Second operand has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 11:59:36,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:38,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:40,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:42,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 11:59:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:43,882 INFO L93 Difference]: Finished difference Result 703 states and 892 transitions. [2022-12-13 11:59:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 11:59:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 63 [2022-12-13 11:59:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:43,886 INFO L225 Difference]: With dead ends: 703 [2022-12-13 11:59:43,886 INFO L226 Difference]: Without dead ends: 701 [2022-12-13 11:59:43,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 11:59:43,886 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 435 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 83 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:43,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 927 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1350 Invalid, 4 Unknown, 0 Unchecked, 9.0s Time] [2022-12-13 11:59:43,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-12-13 11:59:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 619. [2022-12-13 11:59:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 590 states have (on average 1.259322033898305) internal successors, (743), 594 states have internal predecessors, (743), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 11:59:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 783 transitions. [2022-12-13 11:59:44,148 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 783 transitions. Word has length 63 [2022-12-13 11:59:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:44,148 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 783 transitions. [2022-12-13 11:59:44,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.789473684210526) internal successors, (106), 37 states have internal predecessors, (106), 7 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 11:59:44,148 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 783 transitions. [2022-12-13 11:59:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 11:59:44,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:44,149 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:44,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 11:59:44,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 11:59:44,351 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:44,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash 2005256085, now seen corresponding path program 7 times [2022-12-13 11:59:44,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:44,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373413845] [2022-12-13 11:59:44,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:44,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 11:59:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373413845] [2022-12-13 11:59:44,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373413845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141966914] [2022-12-13 11:59:44,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 11:59:44,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:44,666 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:44,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 11:59:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:44,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 11:59:44,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 11:59:44,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 11:59:45,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141966914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:45,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:45,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 12] total 28 [2022-12-13 11:59:45,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172124461] [2022-12-13 11:59:45,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:45,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 11:59:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:45,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 11:59:45,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2022-12-13 11:59:45,107 INFO L87 Difference]: Start difference. First operand 619 states and 783 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:59:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:46,945 INFO L93 Difference]: Finished difference Result 1685 states and 2170 transitions. [2022-12-13 11:59:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 11:59:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-12-13 11:59:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:46,951 INFO L225 Difference]: With dead ends: 1685 [2022-12-13 11:59:46,951 INFO L226 Difference]: Without dead ends: 1263 [2022-12-13 11:59:46,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 11:59:46,952 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1062 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:46,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1065 Valid, 1651 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 11:59:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-12-13 11:59:47,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 703. [2022-12-13 11:59:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 674 states have (on average 1.268545994065282) internal successors, (855), 678 states have internal predecessors, (855), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 11:59:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 895 transitions. [2022-12-13 11:59:47,274 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 895 transitions. Word has length 61 [2022-12-13 11:59:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:47,274 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 895 transitions. [2022-12-13 11:59:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 11:59:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 895 transitions. [2022-12-13 11:59:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 11:59:47,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:47,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 11:59:47,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 11:59:47,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 11:59:47,476 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:47,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1579304483, now seen corresponding path program 3 times [2022-12-13 11:59:47,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:47,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881653158] [2022-12-13 11:59:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:47,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:48,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 11:59:48,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881653158] [2022-12-13 11:59:48,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881653158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:48,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178311633] [2022-12-13 11:59:48,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:59:48,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:48,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:48,277 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:48,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 11:59:48,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 11:59:48,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:48,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 11:59:48,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:48,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 11:59:49,107 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 11:59:49,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2022-12-13 11:59:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-13 11:59:49,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 11:59:49,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178311633] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:49,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:49,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 13] total 45 [2022-12-13 11:59:49,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955606229] [2022-12-13 11:59:49,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:49,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 11:59:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:49,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 11:59:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1765, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 11:59:49,777 INFO L87 Difference]: Start difference. First operand 703 states and 895 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:59:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:59:53,048 INFO L93 Difference]: Finished difference Result 1049 states and 1355 transitions. [2022-12-13 11:59:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 11:59:53,049 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2022-12-13 11:59:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:59:53,050 INFO L225 Difference]: With dead ends: 1049 [2022-12-13 11:59:53,050 INFO L226 Difference]: Without dead ends: 953 [2022-12-13 11:59:53,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=708, Invalid=5298, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 11:59:53,051 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 651 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 11:59:53,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1752 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 11:59:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-12-13 11:59:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 761. [2022-12-13 11:59:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 732 states have (on average 1.2745901639344261) internal successors, (933), 736 states have internal predecessors, (933), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 11:59:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 973 transitions. [2022-12-13 11:59:53,377 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 973 transitions. Word has length 62 [2022-12-13 11:59:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:59:53,377 INFO L495 AbstractCegarLoop]: Abstraction has 761 states and 973 transitions. [2022-12-13 11:59:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:59:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 973 transitions. [2022-12-13 11:59:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 11:59:53,378 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:59:53,378 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:59:53,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 11:59:53,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 11:59:53,579 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:59:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:59:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash -892086793, now seen corresponding path program 8 times [2022-12-13 11:59:53,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:59:53,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95476626] [2022-12-13 11:59:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:59:53,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:59:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:54,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 11:59:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:54,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 11:59:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:59:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:59:54,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:59:54,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95476626] [2022-12-13 11:59:54,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95476626] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:59:54,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916947182] [2022-12-13 11:59:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:59:54,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:59:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:59:54,238 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:59:54,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 11:59:54,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:59:54,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:59:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 11:59:54,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:59:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 11:59:54,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:59:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 11:59:54,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916947182] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:59:54,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:59:54,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 39 [2022-12-13 11:59:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741836125] [2022-12-13 11:59:54,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:59:54,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 11:59:54,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:59:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 11:59:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 11:59:54,833 INFO L87 Difference]: Start difference. First operand 761 states and 973 transitions. Second operand has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:00:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:00:16,018 INFO L93 Difference]: Finished difference Result 3577 states and 4673 transitions. [2022-12-13 12:00:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-12-13 12:00:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-12-13 12:00:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:00:16,026 INFO L225 Difference]: With dead ends: 3577 [2022-12-13 12:00:16,026 INFO L226 Difference]: Without dead ends: 3386 [2022-12-13 12:00:16,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10041 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=2804, Invalid=27646, Unknown=0, NotChecked=0, Total=30450 [2022-12-13 12:00:16,029 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 3491 mSDsluCounter, 5617 mSDsCounter, 0 mSdLazyCounter, 4642 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 5923 SdHoareTripleChecker+Invalid, 5265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 4642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:00:16,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 5923 Invalid, 5265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 4642 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-13 12:00:16,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2022-12-13 12:00:16,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 673. [2022-12-13 12:00:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 644 states have (on average 1.2826086956521738) internal successors, (826), 648 states have internal predecessors, (826), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:00:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 866 transitions. [2022-12-13 12:00:16,422 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 866 transitions. Word has length 63 [2022-12-13 12:00:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:00:16,422 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 866 transitions. [2022-12-13 12:00:16,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.717948717948718) internal successors, (106), 39 states have internal predecessors, (106), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:00:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 866 transitions. [2022-12-13 12:00:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 12:00:16,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:00:16,423 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 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] [2022-12-13 12:00:16,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 12:00:16,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 12:00:16,625 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:00:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2033592005, now seen corresponding path program 3 times [2022-12-13 12:00:16,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:16,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537007824] [2022-12-13 12:00:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:16,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:16,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:00:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:00:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 12:00:16,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:16,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537007824] [2022-12-13 12:00:16,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537007824] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:16,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084558088] [2022-12-13 12:00:16,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:00:16,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:16,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:16,865 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:16,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 12:00:17,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 12:00:17,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:17,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 12:00:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 12:00:17,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-13 12:00:17,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084558088] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:17,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:17,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2022-12-13 12:00:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406574231] [2022-12-13 12:00:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 12:00:17,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:17,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 12:00:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2022-12-13 12:00:17,760 INFO L87 Difference]: Start difference. First operand 673 states and 866 transitions. Second operand has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:00:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:00:21,177 INFO L93 Difference]: Finished difference Result 863 states and 1110 transitions. [2022-12-13 12:00:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-13 12:00:21,178 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2022-12-13 12:00:21,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:00:21,179 INFO L225 Difference]: With dead ends: 863 [2022-12-13 12:00:21,180 INFO L226 Difference]: Without dead ends: 807 [2022-12-13 12:00:21,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=717, Invalid=4833, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 12:00:21,180 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1185 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1185 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:00:21,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1185 Valid, 1100 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 12:00:21,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-12-13 12:00:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 687. [2022-12-13 12:00:21,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 658 states have (on average 1.2826747720364742) internal successors, (844), 662 states have internal predecessors, (844), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:00:21,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 884 transitions. [2022-12-13 12:00:21,570 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 884 transitions. Word has length 67 [2022-12-13 12:00:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:00:21,570 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 884 transitions. [2022-12-13 12:00:21,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.4) internal successors, (102), 30 states have internal predecessors, (102), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:00:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 884 transitions. [2022-12-13 12:00:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 12:00:21,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:00:21,571 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-13 12:00:21,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 12:00:21,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:21,773 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:00:21,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:21,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1736078367, now seen corresponding path program 9 times [2022-12-13 12:00:21,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:21,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779538243] [2022-12-13 12:00:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:21,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:00:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:22,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:00:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 12:00:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:22,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779538243] [2022-12-13 12:00:22,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779538243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:22,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106762072] [2022-12-13 12:00:22,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:00:22,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:22,760 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:22,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 12:00:25,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 12:00:25,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:25,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 12:00:25,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:26,581 INFO L321 Elim1Store]: treesize reduction 40, result has 49.4 percent of original size [2022-12-13 12:00:26,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 74 [2022-12-13 12:00:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 12:00:26,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:28,027 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 12:00:28,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 12:00:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:00:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106762072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:29,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:29,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 22] total 68 [2022-12-13 12:00:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125381565] [2022-12-13 12:00:29,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 12:00:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 12:00:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 12:00:29,285 INFO L87 Difference]: Start difference. First operand 687 states and 884 transitions. Second operand has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:00:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:00:46,886 INFO L93 Difference]: Finished difference Result 2542 states and 3322 transitions. [2022-12-13 12:00:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-12-13 12:00:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-12-13 12:00:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:00:46,890 INFO L225 Difference]: With dead ends: 2542 [2022-12-13 12:00:46,890 INFO L226 Difference]: Without dead ends: 2484 [2022-12-13 12:00:46,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7386 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2222, Invalid=24510, Unknown=0, NotChecked=0, Total=26732 [2022-12-13 12:00:46,892 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 2138 mSDsluCounter, 5707 mSDsCounter, 0 mSdLazyCounter, 8829 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2138 SdHoareTripleChecker+Valid, 5922 SdHoareTripleChecker+Invalid, 9299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 8829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:00:46,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2138 Valid, 5922 Invalid, 9299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 8829 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-12-13 12:00:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2022-12-13 12:00:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 711. [2022-12-13 12:00:47,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 682 states have (on average 1.281524926686217) internal successors, (874), 686 states have internal predecessors, (874), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:00:47,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 914 transitions. [2022-12-13 12:00:47,334 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 914 transitions. Word has length 68 [2022-12-13 12:00:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:00:47,334 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 914 transitions. [2022-12-13 12:00:47,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.1791044776119404) internal successors, (146), 67 states have internal predecessors, (146), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:00:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 914 transitions. [2022-12-13 12:00:47,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 12:00:47,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:00:47,335 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-13 12:00:47,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-13 12:00:47,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:47,536 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:00:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:47,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1104262353, now seen corresponding path program 10 times [2022-12-13 12:00:47,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:47,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628811537] [2022-12-13 12:00:47,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:47,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:47,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:48,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:00:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:48,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:00:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 12:00:48,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:48,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628811537] [2022-12-13 12:00:48,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628811537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:48,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892557119] [2022-12-13 12:00:48,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:00:48,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:48,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:48,560 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:48,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 12:00:48,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:00:48,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:00:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 12:00:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:00:49,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:49,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:00:49,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:00:49,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:00:49,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2022-12-13 12:00:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:00:49,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:00:50,064 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 12:00:50,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 12:00:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:00:51,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892557119] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:00:51,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:00:51,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 17] total 52 [2022-12-13 12:00:51,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841961249] [2022-12-13 12:00:51,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:00:51,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 12:00:51,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:00:51,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 12:00:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2429, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 12:00:51,151 INFO L87 Difference]: Start difference. First operand 711 states and 914 transitions. Second operand has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:00:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:00:55,276 INFO L93 Difference]: Finished difference Result 1222 states and 1586 transitions. [2022-12-13 12:00:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 12:00:55,276 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2022-12-13 12:00:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:00:55,278 INFO L225 Difference]: With dead ends: 1222 [2022-12-13 12:00:55,278 INFO L226 Difference]: Without dead ends: 1060 [2022-12-13 12:00:55,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 104 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=568, Invalid=5132, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 12:00:55,279 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 598 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 3235 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 2221 SdHoareTripleChecker+Invalid, 3330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:00:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 2221 Invalid, 3330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3235 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 12:00:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2022-12-13 12:00:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 741. [2022-12-13 12:00:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 712 states have (on average 1.2808988764044944) internal successors, (912), 716 states have internal predecessors, (912), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:00:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 952 transitions. [2022-12-13 12:00:55,735 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 952 transitions. Word has length 68 [2022-12-13 12:00:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:00:55,735 INFO L495 AbstractCegarLoop]: Abstraction has 741 states and 952 transitions. [2022-12-13 12:00:55,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 51 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:00:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 952 transitions. [2022-12-13 12:00:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 12:00:55,736 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:00:55,736 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-13 12:00:55,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 12:00:55,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:55,938 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:00:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:00:55,939 INFO L85 PathProgramCache]: Analyzing trace with hash -797080539, now seen corresponding path program 11 times [2022-12-13 12:00:55,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:00:55,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638510426] [2022-12-13 12:00:55,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:00:55,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:00:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:56,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:00:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:00:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:00:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 12:00:56,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:00:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638510426] [2022-12-13 12:00:56,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638510426] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:00:56,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186804696] [2022-12-13 12:00:56,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:00:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:00:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:00:56,872 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:00:56,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 12:01:00,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 12:01:00,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:01:00,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-13 12:01:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:01:00,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 12:01:00,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 12:01:01,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:01:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 12:01:02,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:01:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:01:06,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186804696] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:01:06,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:01:06,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 24] total 68 [2022-12-13 12:01:06,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830100101] [2022-12-13 12:01:06,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:01:06,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 12:01:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:01:06,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 12:01:06,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=521, Invalid=4035, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 12:01:06,022 INFO L87 Difference]: Start difference. First operand 741 states and 952 transitions. Second operand has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:01:36,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:01:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:01:53,955 INFO L93 Difference]: Finished difference Result 2456 states and 3209 transitions. [2022-12-13 12:01:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-12-13 12:01:53,956 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-12-13 12:01:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:01:53,959 INFO L225 Difference]: With dead ends: 2456 [2022-12-13 12:01:53,959 INFO L226 Difference]: Without dead ends: 2279 [2022-12-13 12:01:53,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9589 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=3395, Invalid=27757, Unknown=0, NotChecked=0, Total=31152 [2022-12-13 12:01:53,961 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1932 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 7535 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 7979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 7535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:01:53,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 3299 Invalid, 7979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 7535 Invalid, 0 Unknown, 0 Unchecked, 21.9s Time] [2022-12-13 12:01:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-12-13 12:01:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 797. [2022-12-13 12:01:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 768 states have (on average 1.2864583333333333) internal successors, (988), 772 states have internal predecessors, (988), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:01:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1028 transitions. [2022-12-13 12:01:54,481 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1028 transitions. Word has length 68 [2022-12-13 12:01:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:01:54,481 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1028 transitions. [2022-12-13 12:01:54,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.1176470588235294) internal successors, (144), 66 states have internal predecessors, (144), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:01:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1028 transitions. [2022-12-13 12:01:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 12:01:54,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:01:54,482 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-13 12:01:54,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-13 12:01:54,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 12:01:54,684 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:01:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:01:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1785704929, now seen corresponding path program 12 times [2022-12-13 12:01:54,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:01:54,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013931256] [2022-12-13 12:01:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:01:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:01:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:01:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:01:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:01:55,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:01:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:01:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 12:01:55,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:01:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013931256] [2022-12-13 12:01:55,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013931256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:01:55,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850991645] [2022-12-13 12:01:55,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:01:55,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:01:55,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:01:55,567 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:01:55,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 12:01:55,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 12:01:55,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:01:55,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 12:01:55,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:01:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:01:56,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:01:56,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:01:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:01:56,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:01:56,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 84 treesize of output 31 [2022-12-13 12:01:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:01:56,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:01:56,748 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 12:01:56,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 12:01:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 12:01:57,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850991645] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:01:57,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:01:57,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26, 16] total 44 [2022-12-13 12:01:57,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001912012] [2022-12-13 12:01:57,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:01:57,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 12:01:57,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:01:57,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 12:01:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1730, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 12:01:57,510 INFO L87 Difference]: Start difference. First operand 797 states and 1028 transitions. Second operand has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:02:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:00,925 INFO L93 Difference]: Finished difference Result 1275 states and 1664 transitions. [2022-12-13 12:02:00,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 12:02:00,926 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2022-12-13 12:02:00,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:00,928 INFO L225 Difference]: With dead ends: 1275 [2022-12-13 12:02:00,928 INFO L226 Difference]: Without dead ends: 1217 [2022-12-13 12:02:00,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=455, Invalid=4101, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 12:02:00,929 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 468 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:00,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1928 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2456 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 12:02:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-12-13 12:02:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 793. [2022-12-13 12:02:01,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 764 states have (on average 1.287958115183246) internal successors, (984), 768 states have internal predecessors, (984), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:02:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1024 transitions. [2022-12-13 12:02:01,434 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1024 transitions. Word has length 68 [2022-12-13 12:02:01,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:01,434 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1024 transitions. [2022-12-13 12:02:01,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.477272727272727) internal successors, (109), 43 states have internal predecessors, (109), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:02:01,434 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1024 transitions. [2022-12-13 12:02:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 12:02:01,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:01,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2022-12-13 12:02:01,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 12:02:01,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 12:02:01,636 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:01,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1009014033, now seen corresponding path program 2 times [2022-12-13 12:02:01,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:01,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757542520] [2022-12-13 12:02:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:01,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 12:02:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 12:02:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-12-13 12:02:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:01,734 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-12-13 12:02:01,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757542520] [2022-12-13 12:02:01,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757542520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:02:01,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:02:01,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 12:02:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998367793] [2022-12-13 12:02:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:02:01,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 12:02:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 12:02:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:02:01,735 INFO L87 Difference]: Start difference. First operand 793 states and 1024 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 12:02:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:02,319 INFO L93 Difference]: Finished difference Result 862 states and 1110 transitions. [2022-12-13 12:02:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 12:02:02,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-13 12:02:02,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:02,321 INFO L225 Difference]: With dead ends: 862 [2022-12-13 12:02:02,321 INFO L226 Difference]: Without dead ends: 813 [2022-12-13 12:02:02,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 12:02:02,322 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:02,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 174 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:02:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-12-13 12:02:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 805. [2022-12-13 12:02:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 776 states have (on average 1.2835051546391754) internal successors, (996), 780 states have internal predecessors, (996), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-13 12:02:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1036 transitions. [2022-12-13 12:02:02,836 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1036 transitions. Word has length 73 [2022-12-13 12:02:02,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:02,836 INFO L495 AbstractCegarLoop]: Abstraction has 805 states and 1036 transitions. [2022-12-13 12:02:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 12:02:02,836 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1036 transitions. [2022-12-13 12:02:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 12:02:02,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:02,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-12-13 12:02:02,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-13 12:02:02,837 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:02,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:02,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1900032544, now seen corresponding path program 1 times [2022-12-13 12:02:02,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:02,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297883095] [2022-12-13 12:02:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:02,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-12-13 12:02:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-12-13 12:02:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 12:02:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:02:03,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297883095] [2022-12-13 12:02:03,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297883095] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:03,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021268811] [2022-12-13 12:02:03,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:03,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:03,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:03,038 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:03,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 12:02:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:03,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 12:02:03,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:02:03,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:02:03,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021268811] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:03,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:03,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-12-13 12:02:03,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150789980] [2022-12-13 12:02:03,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:03,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 12:02:03,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:03,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 12:02:03,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 12:02:03,363 INFO L87 Difference]: Start difference. First operand 805 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 12:02:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:04,220 INFO L93 Difference]: Finished difference Result 818 states and 1047 transitions. [2022-12-13 12:02:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 12:02:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2022-12-13 12:02:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:04,222 INFO L225 Difference]: With dead ends: 818 [2022-12-13 12:02:04,222 INFO L226 Difference]: Without dead ends: 758 [2022-12-13 12:02:04,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-12-13 12:02:04,223 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 62 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:04,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 672 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:02:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-12-13 12:02:04,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2022-12-13 12:02:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 734 states have (on average 1.2956403269754768) internal successors, (951), 737 states have internal predecessors, (951), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:02:04,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 981 transitions. [2022-12-13 12:02:04,703 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 981 transitions. Word has length 74 [2022-12-13 12:02:04,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:04,703 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 981 transitions. [2022-12-13 12:02:04,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 12:02:04,703 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 981 transitions. [2022-12-13 12:02:04,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 12:02:04,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:04,704 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-12-13 12:02:04,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 12:02:04,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 12:02:04,906 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:04,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1078383189, now seen corresponding path program 2 times [2022-12-13 12:02:04,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:04,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742236489] [2022-12-13 12:02:04,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:04,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:05,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:05,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:05,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 12:02:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-12-13 12:02:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:05,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-12-13 12:02:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-13 12:02:05,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:05,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742236489] [2022-12-13 12:02:05,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742236489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:05,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144991990] [2022-12-13 12:02:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:02:05,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:05,085 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:05,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 12:02:05,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:02:05,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 12:02:05,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-13 12:02:05,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 12:02:05,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144991990] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:05,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:05,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 10] total 25 [2022-12-13 12:02:05,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552681451] [2022-12-13 12:02:05,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:05,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:02:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:02:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-13 12:02:05,741 INFO L87 Difference]: Start difference. First operand 758 states and 981 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 12:02:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:07,895 INFO L93 Difference]: Finished difference Result 1141 states and 1474 transitions. [2022-12-13 12:02:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 12:02:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 74 [2022-12-13 12:02:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:07,899 INFO L225 Difference]: With dead ends: 1141 [2022-12-13 12:02:07,899 INFO L226 Difference]: Without dead ends: 1035 [2022-12-13 12:02:07,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=1402, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 12:02:07,900 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 343 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:07,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 823 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 12:02:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-12-13 12:02:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 760. [2022-12-13 12:02:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 736 states have (on average 1.28125) internal successors, (943), 739 states have internal predecessors, (943), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:02:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 973 transitions. [2022-12-13 12:02:08,384 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 973 transitions. Word has length 74 [2022-12-13 12:02:08,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:08,384 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 973 transitions. [2022-12-13 12:02:08,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 12:02:08,385 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 973 transitions. [2022-12-13 12:02:08,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 12:02:08,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:08,385 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-13 12:02:08,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 12:02:08,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 12:02:08,587 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:08,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:08,587 INFO L85 PathProgramCache]: Analyzing trace with hash 894264333, now seen corresponding path program 13 times [2022-12-13 12:02:08,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:08,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294157767] [2022-12-13 12:02:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:08,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:08,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 12:02:08,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294157767] [2022-12-13 12:02:08,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294157767] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:08,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341405072] [2022-12-13 12:02:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:02:08,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:08,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:08,924 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:08,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 12:02:09,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 12:02:09,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 54 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 12:02:09,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 12:02:09,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341405072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:09,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:09,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14] total 33 [2022-12-13 12:02:09,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880239907] [2022-12-13 12:02:09,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:09,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:02:09,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:02:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 12:02:09,545 INFO L87 Difference]: Start difference. First operand 760 states and 973 transitions. Second operand has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:13,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:13,464 INFO L93 Difference]: Finished difference Result 2724 states and 3534 transitions. [2022-12-13 12:02:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 12:02:13,465 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2022-12-13 12:02:13,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:13,469 INFO L225 Difference]: With dead ends: 2724 [2022-12-13 12:02:13,469 INFO L226 Difference]: Without dead ends: 2256 [2022-12-13 12:02:13,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=524, Invalid=3636, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 12:02:13,471 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 1643 mSDsluCounter, 2619 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1647 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:13,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1647 Valid, 2791 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1930 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 12:02:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-12-13 12:02:14,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 834. [2022-12-13 12:02:14,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 810 states have (on average 1.2938271604938272) internal successors, (1048), 813 states have internal predecessors, (1048), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:02:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1078 transitions. [2022-12-13 12:02:14,019 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1078 transitions. Word has length 71 [2022-12-13 12:02:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:14,019 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1078 transitions. [2022-12-13 12:02:14,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.727272727272727) internal successors, (90), 33 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:14,019 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1078 transitions. [2022-12-13 12:02:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 12:02:14,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:14,020 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 3, 3, 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] [2022-12-13 12:02:14,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 12:02:14,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 12:02:14,221 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:14,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:14,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1854811415, now seen corresponding path program 1 times [2022-12-13 12:02:14,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:14,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776049950] [2022-12-13 12:02:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:14,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:14,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-13 12:02:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776049950] [2022-12-13 12:02:14,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776049950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:14,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229143031] [2022-12-13 12:02:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:14,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:14,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:14,447 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:14,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 12:02:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 12:02:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 42 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 12:02:14,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 40 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-13 12:02:15,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229143031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:15,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:15,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 11] total 33 [2022-12-13 12:02:15,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296253588] [2022-12-13 12:02:15,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 12:02:15,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:15,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 12:02:15,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 12:02:15,006 INFO L87 Difference]: Start difference. First operand 834 states and 1078 transitions. Second operand has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:16,765 INFO L93 Difference]: Finished difference Result 1285 states and 1643 transitions. [2022-12-13 12:02:16,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 12:02:16,766 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2022-12-13 12:02:16,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:16,768 INFO L225 Difference]: With dead ends: 1285 [2022-12-13 12:02:16,768 INFO L226 Difference]: Without dead ends: 977 [2022-12-13 12:02:16,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 12:02:16,768 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 114 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:16,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1804 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 12:02:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2022-12-13 12:02:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 812. [2022-12-13 12:02:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 788 states have (on average 1.2931472081218274) internal successors, (1019), 791 states have internal predecessors, (1019), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:02:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1049 transitions. [2022-12-13 12:02:17,311 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1049 transitions. Word has length 71 [2022-12-13 12:02:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1049 transitions. [2022-12-13 12:02:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.4375) internal successors, (110), 32 states have internal predecessors, (110), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1049 transitions. [2022-12-13 12:02:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 12:02:17,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:17,313 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-12-13 12:02:17,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-13 12:02:17,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 12:02:17,514 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:17,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:17,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1292302041, now seen corresponding path program 4 times [2022-12-13 12:02:17,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:17,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713878332] [2022-12-13 12:02:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:17,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:18,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 37 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:02:18,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713878332] [2022-12-13 12:02:18,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713878332] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494493372] [2022-12-13 12:02:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:02:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:18,309 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:18,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 12:02:18,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:02:18,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:18,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 79 conjunts are in the unsatisfiable core [2022-12-13 12:02:18,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:18,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:02:19,686 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 12:02:19,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2022-12-13 12:02:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 7 proven. 74 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 12:02:19,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:02:20,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494493372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:20,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:20,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 28, 16] total 56 [2022-12-13 12:02:20,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187782057] [2022-12-13 12:02:20,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:20,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-13 12:02:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:20,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-13 12:02:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 12:02:20,535 INFO L87 Difference]: Start difference. First operand 812 states and 1049 transitions. Second operand has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:02:28,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:28,012 INFO L93 Difference]: Finished difference Result 2113 states and 2788 transitions. [2022-12-13 12:02:28,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-13 12:02:28,012 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2022-12-13 12:02:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:28,014 INFO L225 Difference]: With dead ends: 2113 [2022-12-13 12:02:28,014 INFO L226 Difference]: Without dead ends: 1988 [2022-12-13 12:02:28,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2989 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1480, Invalid=10952, Unknown=0, NotChecked=0, Total=12432 [2022-12-13 12:02:28,015 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 1342 mSDsluCounter, 2993 mSDsCounter, 0 mSdLazyCounter, 4843 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 3147 SdHoareTripleChecker+Invalid, 5136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 4843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:28,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1342 Valid, 3147 Invalid, 5136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 4843 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 12:02:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2022-12-13 12:02:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 881. [2022-12-13 12:02:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 857 states have (on average 1.2987164527421238) internal successors, (1113), 860 states have internal predecessors, (1113), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:02:28,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1143 transitions. [2022-12-13 12:02:28,660 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1143 transitions. Word has length 72 [2022-12-13 12:02:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:28,661 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 1143 transitions. [2022-12-13 12:02:28,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.6545454545454548) internal successors, (146), 54 states have internal predecessors, (146), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:02:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1143 transitions. [2022-12-13 12:02:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 12:02:28,662 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:28,662 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2022-12-13 12:02:28,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 12:02:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:28,863 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:28,863 INFO L85 PathProgramCache]: Analyzing trace with hash 121073647, now seen corresponding path program 14 times [2022-12-13 12:02:28,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:28,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169024881] [2022-12-13 12:02:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:29,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:29,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 12:02:29,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169024881] [2022-12-13 12:02:29,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169024881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574545228] [2022-12-13 12:02:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:02:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:29,250 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:29,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 12:02:29,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:02:29,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 12:02:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:29,622 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 12:02:29,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 5 proven. 38 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-13 12:02:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574545228] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:29,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:29,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-12-13 12:02:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799702867] [2022-12-13 12:02:29,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:02:29,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:02:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 12:02:29,896 INFO L87 Difference]: Start difference. First operand 881 states and 1143 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:32,099 INFO L93 Difference]: Finished difference Result 1442 states and 1858 transitions. [2022-12-13 12:02:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 12:02:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2022-12-13 12:02:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:32,101 INFO L225 Difference]: With dead ends: 1442 [2022-12-13 12:02:32,101 INFO L226 Difference]: Without dead ends: 1175 [2022-12-13 12:02:32,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=351, Invalid=2099, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 12:02:32,102 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 795 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:32,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1910 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 12:02:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-12-13 12:02:32,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 737. [2022-12-13 12:02:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 713 states have (on average 1.2861150070126228) internal successors, (917), 716 states have internal predecessors, (917), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-13 12:02:32,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 947 transitions. [2022-12-13 12:02:32,643 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 947 transitions. Word has length 73 [2022-12-13 12:02:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:32,643 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 947 transitions. [2022-12-13 12:02:32,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 947 transitions. [2022-12-13 12:02:32,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 12:02:32,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:32,644 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 12:02:32,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 12:02:32,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-12-13 12:02:32,845 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:32,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:32,846 INFO L85 PathProgramCache]: Analyzing trace with hash -306423327, now seen corresponding path program 1 times [2022-12-13 12:02:32,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:32,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892278961] [2022-12-13 12:02:32,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:32,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 12:02:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 12:02:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-12-13 12:02:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 12:02:33,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892278961] [2022-12-13 12:02:33,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892278961] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:33,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092719106] [2022-12-13 12:02:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:33,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:33,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:33,563 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:33,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 12:02:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 12:02:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:34,009 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 12:02:34,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-12-13 12:02:34,024 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 12:02:34,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:34,154 INFO L321 Elim1Store]: treesize reduction 19, result has 81.2 percent of original size [2022-12-13 12:02:34,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-12-13 12:02:34,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 12:02:34,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092719106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:34,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:34,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 32 [2022-12-13 12:02:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777962333] [2022-12-13 12:02:34,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 12:02:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 12:02:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-12-13 12:02:34,453 INFO L87 Difference]: Start difference. First operand 737 states and 947 transitions. Second operand has 32 states, 30 states have (on average 3.6) internal successors, (108), 32 states have internal predecessors, (108), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 12:02:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:35,958 INFO L93 Difference]: Finished difference Result 954 states and 1228 transitions. [2022-12-13 12:02:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 12:02:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 32 states have internal predecessors, (108), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 78 [2022-12-13 12:02:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:35,960 INFO L225 Difference]: With dead ends: 954 [2022-12-13 12:02:35,960 INFO L226 Difference]: Without dead ends: 925 [2022-12-13 12:02:35,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 12:02:35,961 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 210 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:35,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1276 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 12:02:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2022-12-13 12:02:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 751. [2022-12-13 12:02:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 725 states have (on average 1.2813793103448277) internal successors, (929), 728 states have internal predecessors, (929), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 12:02:36,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 963 transitions. [2022-12-13 12:02:36,530 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 963 transitions. Word has length 78 [2022-12-13 12:02:36,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:36,531 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 963 transitions. [2022-12-13 12:02:36,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.6) internal successors, (108), 32 states have internal predecessors, (108), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 12:02:36,531 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 963 transitions. [2022-12-13 12:02:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 12:02:36,531 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:36,532 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2022-12-13 12:02:36,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 12:02:36,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:36,733 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:36,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -2061405423, now seen corresponding path program 15 times [2022-12-13 12:02:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:36,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134991644] [2022-12-13 12:02:36,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-13 12:02:37,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134991644] [2022-12-13 12:02:37,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134991644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:37,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427647825] [2022-12-13 12:02:37,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:02:37,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:37,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:37,274 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:37,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 12:02:39,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 12:02:39,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:02:39,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 12:02:39,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 12:02:39,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:02:40,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427647825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:40,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:40,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 15] total 47 [2022-12-13 12:02:40,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319107962] [2022-12-13 12:02:40,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:40,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-13 12:02:40,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:40,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-13 12:02:40,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 12:02:40,410 INFO L87 Difference]: Start difference. First operand 751 states and 963 transitions. Second operand has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:02:55,197 INFO L93 Difference]: Finished difference Result 4804 states and 6217 transitions. [2022-12-13 12:02:55,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-12-13 12:02:55,198 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 75 [2022-12-13 12:02:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:02:55,203 INFO L225 Difference]: With dead ends: 4804 [2022-12-13 12:02:55,203 INFO L226 Difference]: Without dead ends: 4096 [2022-12-13 12:02:55,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9533 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=2985, Invalid=29595, Unknown=0, NotChecked=0, Total=32580 [2022-12-13 12:02:55,205 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 3176 mSDsluCounter, 6918 mSDsCounter, 0 mSdLazyCounter, 6502 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3176 SdHoareTripleChecker+Valid, 7260 SdHoareTripleChecker+Invalid, 6748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 6502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:02:55,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3176 Valid, 7260 Invalid, 6748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 6502 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 12:02:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2022-12-13 12:02:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 722. [2022-12-13 12:02:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 696 states have (on average 1.2729885057471264) internal successors, (886), 699 states have internal predecessors, (886), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-13 12:02:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 920 transitions. [2022-12-13 12:02:55,810 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 920 transitions. Word has length 75 [2022-12-13 12:02:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:02:55,811 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 920 transitions. [2022-12-13 12:02:55,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.851063829787234) internal successors, (134), 47 states have internal predecessors, (134), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:02:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 920 transitions. [2022-12-13 12:02:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 12:02:55,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:02:55,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 12:02:55,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-13 12:02:56,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-12-13 12:02:56,012 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:02:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:02:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash -75104113, now seen corresponding path program 1 times [2022-12-13 12:02:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:02:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059849458] [2022-12-13 12:02:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:02:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:02:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:02:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 12:02:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 12:02:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 12:02:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 12:02:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:02:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059849458] [2022-12-13 12:02:56,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059849458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:02:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107741732] [2022-12-13 12:02:56,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:02:56,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:02:56,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:02:56,768 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:02:56,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 12:02:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:02:56,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 12:02:56,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:02:57,233 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 12:02:57,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2022-12-13 12:02:57,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 12:02:57,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:02:57,455 INFO L321 Elim1Store]: treesize reduction 15, result has 84.2 percent of original size [2022-12-13 12:02:57,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 87 [2022-12-13 12:02:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-13 12:02:57,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107741732] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:02:57,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:02:57,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13, 10] total 35 [2022-12-13 12:02:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099279202] [2022-12-13 12:02:57,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:02:57,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:02:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:02:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:02:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 12:02:57,671 INFO L87 Difference]: Start difference. First operand 722 states and 920 transitions. Second operand has 35 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 9 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 12:02:59,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:00,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:02,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:04,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:03:06,891 INFO L93 Difference]: Finished difference Result 943 states and 1206 transitions. [2022-12-13 12:03:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 12:03:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 9 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) Word has length 79 [2022-12-13 12:03:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:03:06,892 INFO L225 Difference]: With dead ends: 943 [2022-12-13 12:03:06,892 INFO L226 Difference]: Without dead ends: 909 [2022-12-13 12:03:06,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=316, Invalid=2546, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 12:03:06,893 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 344 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 1770 mSolverCounterSat, 69 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1770 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:03:06,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 1850 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1770 Invalid, 4 Unknown, 0 Unchecked, 7.8s Time] [2022-12-13 12:03:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-12-13 12:03:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 797. [2022-12-13 12:03:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 768 states have (on average 1.2747395833333333) internal successors, (979), 771 states have internal predecessors, (979), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-13 12:03:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 1016 transitions. [2022-12-13 12:03:07,588 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 1016 transitions. Word has length 79 [2022-12-13 12:03:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:03:07,588 INFO L495 AbstractCegarLoop]: Abstraction has 797 states and 1016 transitions. [2022-12-13 12:03:07,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.6666666666666665) internal successors, (121), 34 states have internal predecessors, (121), 9 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 7 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 12:03:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 1016 transitions. [2022-12-13 12:03:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 12:03:07,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:03:07,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-12-13 12:03:07,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-13 12:03:07,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-13 12:03:07,791 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:03:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1771822365, now seen corresponding path program 2 times [2022-12-13 12:03:07,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:03:07,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117666666] [2022-12-13 12:03:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:03:07,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:03:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:08,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:03:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:03:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:08,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-12-13 12:03:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:08,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-12-13 12:03:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-12-13 12:03:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-13 12:03:08,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:03:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117666666] [2022-12-13 12:03:08,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117666666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:03:08,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909187408] [2022-12-13 12:03:08,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:03:08,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:03:08,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:03:08,539 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:03:08,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 12:03:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:03:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:03:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 69 conjunts are in the unsatisfiable core [2022-12-13 12:03:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:03:09,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:03:09,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2022-12-13 12:03:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 12:03:09,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:03:09,318 INFO L321 Elim1Store]: treesize reduction 19, result has 81.6 percent of original size [2022-12-13 12:03:09,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 91 [2022-12-13 12:03:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 12:03:09,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909187408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:03:09,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:03:09,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 15] total 40 [2022-12-13 12:03:09,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537513128] [2022-12-13 12:03:09,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:03:09,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 12:03:09,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:03:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 12:03:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 12:03:09,967 INFO L87 Difference]: Start difference. First operand 797 states and 1016 transitions. Second operand has 40 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 38 states have internal predecessors, (129), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-13 12:03:12,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:14,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:16,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:18,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:20,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 12:03:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:03:22,190 INFO L93 Difference]: Finished difference Result 1200 states and 1536 transitions. [2022-12-13 12:03:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 12:03:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 38 states have internal predecessors, (129), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 79 [2022-12-13 12:03:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:03:22,193 INFO L225 Difference]: With dead ends: 1200 [2022-12-13 12:03:22,193 INFO L226 Difference]: Without dead ends: 1054 [2022-12-13 12:03:22,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=258, Invalid=2292, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 12:03:22,194 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 182 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 44 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:03:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 2168 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1719 Invalid, 5 Unknown, 0 Unchecked, 10.9s Time] [2022-12-13 12:03:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-12-13 12:03:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 938. [2022-12-13 12:03:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 897 states have (on average 1.2731326644370122) internal successors, (1142), 902 states have internal predecessors, (1142), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:03:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1194 transitions. [2022-12-13 12:03:23,069 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1194 transitions. Word has length 79 [2022-12-13 12:03:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:03:23,069 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1194 transitions. [2022-12-13 12:03:23,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.3076923076923075) internal successors, (129), 38 states have internal predecessors, (129), 9 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-12-13 12:03:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1194 transitions. [2022-12-13 12:03:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 12:03:23,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:03:23,070 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 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] [2022-12-13 12:03:23,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 12:03:23,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:03:23,272 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:03:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:23,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1089634329, now seen corresponding path program 4 times [2022-12-13 12:03:23,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:03:23,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004296800] [2022-12-13 12:03:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:03:23,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:03:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:23,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:03:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:23,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:03:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 12:03:23,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:03:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004296800] [2022-12-13 12:03:23,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004296800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:03:23,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959532288] [2022-12-13 12:03:23,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:03:23,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:03:23,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:03:23,500 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:03:23,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 12:03:23,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:03:23,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:03:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:03:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:03:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 65 proven. 38 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 12:03:23,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:03:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 65 proven. 38 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-13 12:03:24,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959532288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:03:24,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:03:24,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-12-13 12:03:24,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68372154] [2022-12-13 12:03:24,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:03:24,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 12:03:24,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:03:24,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 12:03:24,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 12:03:24,013 INFO L87 Difference]: Start difference. First operand 938 states and 1194 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:03:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:03:26,732 INFO L93 Difference]: Finished difference Result 1656 states and 2106 transitions. [2022-12-13 12:03:26,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 12:03:26,733 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2022-12-13 12:03:26,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:03:26,734 INFO L225 Difference]: With dead ends: 1656 [2022-12-13 12:03:26,734 INFO L226 Difference]: Without dead ends: 1344 [2022-12-13 12:03:26,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=309, Invalid=2661, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 12:03:26,735 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 220 mSDsluCounter, 2490 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 1936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 12:03:26,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 2604 Invalid, 1936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 12:03:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-12-13 12:03:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1002. [2022-12-13 12:03:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 961 states have (on average 1.2736732570239333) internal successors, (1224), 966 states have internal predecessors, (1224), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:03:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1276 transitions. [2022-12-13 12:03:27,676 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1276 transitions. Word has length 77 [2022-12-13 12:03:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:03:27,677 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1276 transitions. [2022-12-13 12:03:27,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:03:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1276 transitions. [2022-12-13 12:03:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 12:03:27,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:03:27,678 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-12-13 12:03:27,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-12-13 12:03:27,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 12:03:27,879 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:03:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:27,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1281507689, now seen corresponding path program 16 times [2022-12-13 12:03:27,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:03:27,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229871348] [2022-12-13 12:03:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:03:27,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:03:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:29,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:03:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:29,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:03:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 12:03:29,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:03:29,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229871348] [2022-12-13 12:03:29,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229871348] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:03:29,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241746284] [2022-12-13 12:03:29,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:03:29,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:03:29,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:03:29,039 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:03:29,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 12:03:29,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:03:29,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:03:29,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 12:03:29,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:03:30,693 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:03:30,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-12-13 12:03:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 101 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:03:30,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:03:31,989 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 12:03:31,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 12:03:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:03:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241746284] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:03:33,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:03:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 21] total 73 [2022-12-13 12:03:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043634840] [2022-12-13 12:03:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:03:33,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 12:03:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:03:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 12:03:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=4868, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 12:03:33,829 INFO L87 Difference]: Start difference. First operand 1002 states and 1276 transitions. Second operand has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:03:48,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:03:48,968 INFO L93 Difference]: Finished difference Result 2042 states and 2634 transitions. [2022-12-13 12:03:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-13 12:03:48,969 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-12-13 12:03:48,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:03:48,971 INFO L225 Difference]: With dead ends: 2042 [2022-12-13 12:03:48,971 INFO L226 Difference]: Without dead ends: 2002 [2022-12-13 12:03:48,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5293 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1631, Invalid=18391, Unknown=0, NotChecked=0, Total=20022 [2022-12-13 12:03:48,973 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1243 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 8114 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 8384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 8114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:03:48,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 4321 Invalid, 8384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 8114 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-12-13 12:03:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2022-12-13 12:03:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1014. [2022-12-13 12:03:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 973 states have (on average 1.2733812949640289) internal successors, (1239), 978 states have internal predecessors, (1239), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:03:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 1291 transitions. [2022-12-13 12:03:49,952 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 1291 transitions. Word has length 78 [2022-12-13 12:03:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:03:49,953 INFO L495 AbstractCegarLoop]: Abstraction has 1014 states and 1291 transitions. [2022-12-13 12:03:49,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:03:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 1291 transitions. [2022-12-13 12:03:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 12:03:49,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:03:49,954 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-12-13 12:03:49,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 12:03:50,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 12:03:50,155 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:03:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:03:50,155 INFO L85 PathProgramCache]: Analyzing trace with hash -963092143, now seen corresponding path program 17 times [2022-12-13 12:03:50,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:03:50,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964558915] [2022-12-13 12:03:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:03:50,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:03:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:51,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:03:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:51,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:03:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:03:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 12:03:51,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:03:51,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964558915] [2022-12-13 12:03:51,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964558915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:03:51,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524799277] [2022-12-13 12:03:51,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:03:51,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:03:51,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:03:51,288 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:03:51,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 12:04:05,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 12:04:05,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:04:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-13 12:04:05,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:05,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:04:06,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:06,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:04:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:06,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:04:06,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 39 [2022-12-13 12:04:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:04:06,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:04:07,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524799277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:07,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:04:07,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 34, 22] total 64 [2022-12-13 12:04:07,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595717409] [2022-12-13 12:04:07,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:07,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 12:04:07,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 12:04:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=3695, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 12:04:07,359 INFO L87 Difference]: Start difference. First operand 1014 states and 1291 transitions. Second operand has 64 states, 64 states have (on average 2.265625) internal successors, (145), 62 states have internal predecessors, (145), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:04:20,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:04:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:27,903 INFO L93 Difference]: Finished difference Result 2679 states and 3452 transitions. [2022-12-13 12:04:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-12-13 12:04:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 62 states have internal predecessors, (145), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-12-13 12:04:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:27,907 INFO L225 Difference]: With dead ends: 2679 [2022-12-13 12:04:27,907 INFO L226 Difference]: Without dead ends: 2639 [2022-12-13 12:04:27,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 115 SyntacticMatches, 7 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7002 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2215, Invalid=23867, Unknown=0, NotChecked=0, Total=26082 [2022-12-13 12:04:27,908 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 2550 mSDsluCounter, 8912 mSDsCounter, 0 mSdLazyCounter, 12696 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2550 SdHoareTripleChecker+Valid, 9231 SdHoareTripleChecker+Invalid, 13397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 12696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:04:27,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2550 Valid, 9231 Invalid, 13397 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [701 Valid, 12696 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-12-13 12:04:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2022-12-13 12:04:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 1029. [2022-12-13 12:04:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 988 states have (on average 1.2732793522267207) internal successors, (1258), 993 states have internal predecessors, (1258), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:04:28,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1310 transitions. [2022-12-13 12:04:28,900 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1310 transitions. Word has length 78 [2022-12-13 12:04:28,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:28,900 INFO L495 AbstractCegarLoop]: Abstraction has 1029 states and 1310 transitions. [2022-12-13 12:04:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.265625) internal successors, (145), 62 states have internal predecessors, (145), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:04:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1310 transitions. [2022-12-13 12:04:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 12:04:28,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:28,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-12-13 12:04:28,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-13 12:04:29,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:29,102 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash -871331223, now seen corresponding path program 18 times [2022-12-13 12:04:29,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:29,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850064574] [2022-12-13 12:04:29,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:29,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:30,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:04:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:04:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 12:04:30,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850064574] [2022-12-13 12:04:30,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850064574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:04:30,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554434821] [2022-12-13 12:04:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 12:04:30,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:30,180 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:30,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 12:04:32,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 12:04:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:04:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 12:04:32,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:34,259 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-12-13 12:04:34,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2022-12-13 12:04:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 104 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:04:34,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:35,412 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 12:04:35,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 12:04:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:04:36,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554434821] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:36,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:04:36,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31, 19] total 70 [2022-12-13 12:04:36,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751186158] [2022-12-13 12:04:36,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:36,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-13 12:04:36,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:36,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-13 12:04:36,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=4531, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 12:04:36,672 INFO L87 Difference]: Start difference. First operand 1029 states and 1310 transitions. Second operand has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 69 states have internal predecessors, (166), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:04:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:04:50,450 INFO L93 Difference]: Finished difference Result 2215 states and 2854 transitions. [2022-12-13 12:04:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 12:04:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 69 states have internal predecessors, (166), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2022-12-13 12:04:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:04:50,453 INFO L225 Difference]: With dead ends: 2215 [2022-12-13 12:04:50,453 INFO L226 Difference]: Without dead ends: 2071 [2022-12-13 12:04:50,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3964 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1167, Invalid=14583, Unknown=0, NotChecked=0, Total=15750 [2022-12-13 12:04:50,455 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1274 mSDsluCounter, 6141 mSDsCounter, 0 mSdLazyCounter, 8420 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1274 SdHoareTripleChecker+Valid, 6330 SdHoareTripleChecker+Invalid, 8674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 8420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-13 12:04:50,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1274 Valid, 6330 Invalid, 8674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 8420 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-13 12:04:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-12-13 12:04:51,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1047. [2022-12-13 12:04:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1006 states have (on average 1.2733598409542743) internal successors, (1281), 1011 states have internal predecessors, (1281), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:04:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1333 transitions. [2022-12-13 12:04:51,482 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1333 transitions. Word has length 78 [2022-12-13 12:04:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:04:51,483 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 1333 transitions. [2022-12-13 12:04:51,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 69 states have internal predecessors, (166), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:04:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1333 transitions. [2022-12-13 12:04:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 12:04:51,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:04:51,484 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-12-13 12:04:51,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-13 12:04:51,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-13 12:04:51,684 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:04:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:04:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1748727147, now seen corresponding path program 19 times [2022-12-13 12:04:51,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:04:51,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071066338] [2022-12-13 12:04:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:04:51,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:04:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:52,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:04:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:52,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:04:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 12:04:52,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:04:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071066338] [2022-12-13 12:04:52,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071066338] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:04:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850848327] [2022-12-13 12:04:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 12:04:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:04:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:04:52,804 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:04:52,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-13 12:04:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:04:52,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 71 conjunts are in the unsatisfiable core [2022-12-13 12:04:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:04:54,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 12:04:54,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:04:54,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 12:04:54,314 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2022-12-13 12:04:54,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 41 [2022-12-13 12:04:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 24 proven. 68 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 12:04:54,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:04:54,941 INFO L321 Elim1Store]: treesize reduction 19, result has 81.2 percent of original size [2022-12-13 12:04:54,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 89 [2022-12-13 12:04:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-13 12:04:55,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850848327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:04:55,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:04:55,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 13] total 57 [2022-12-13 12:04:55,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624975426] [2022-12-13 12:04:55,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:04:55,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 12:04:55,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:04:55,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 12:04:55,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 12:04:55,652 INFO L87 Difference]: Start difference. First operand 1047 states and 1333 transitions. Second operand has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:05:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:05:07,252 INFO L93 Difference]: Finished difference Result 2643 states and 3418 transitions. [2022-12-13 12:05:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 12:05:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-12-13 12:05:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:05:07,257 INFO L225 Difference]: With dead ends: 2643 [2022-12-13 12:05:07,257 INFO L226 Difference]: Without dead ends: 2493 [2022-12-13 12:05:07,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1413, Invalid=15357, Unknown=0, NotChecked=0, Total=16770 [2022-12-13 12:05:07,259 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1395 mSDsluCounter, 4686 mSDsCounter, 0 mSdLazyCounter, 7731 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1399 SdHoareTripleChecker+Valid, 4864 SdHoareTripleChecker+Invalid, 7993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 7731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:05:07,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1399 Valid, 4864 Invalid, 7993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 7731 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-13 12:05:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-12-13 12:05:08,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 1056. [2022-12-13 12:05:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1015 states have (on average 1.269950738916256) internal successors, (1289), 1020 states have internal predecessors, (1289), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:05:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1341 transitions. [2022-12-13 12:05:08,352 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1341 transitions. Word has length 78 [2022-12-13 12:05:08,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:05:08,352 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1341 transitions. [2022-12-13 12:05:08,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6315789473684212) internal successors, (150), 56 states have internal predecessors, (150), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:05:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1341 transitions. [2022-12-13 12:05:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-13 12:05:08,354 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:05:08,354 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 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] [2022-12-13 12:05:08,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-13 12:05:08,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-12-13 12:05:08,556 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:05:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:08,556 INFO L85 PathProgramCache]: Analyzing trace with hash 834058321, now seen corresponding path program 20 times [2022-12-13 12:05:08,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:08,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072453439] [2022-12-13 12:05:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:08,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:09,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:05:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:09,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:05:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 78 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 12:05:09,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072453439] [2022-12-13 12:05:09,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072453439] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:05:09,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958161579] [2022-12-13 12:05:09,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:05:09,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:09,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:09,705 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:09,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-13 12:05:10,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:05:10,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:05:10,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 87 conjunts are in the unsatisfiable core [2022-12-13 12:05:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:11,765 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 12:05:11,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2022-12-13 12:05:11,804 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 12 proven. 101 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 12:05:11,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:12,746 INFO L321 Elim1Store]: treesize reduction 17, result has 83.5 percent of original size [2022-12-13 12:05:12,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 93 [2022-12-13 12:05:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:05:14,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958161579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:14,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:05:14,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 32, 20] total 73 [2022-12-13 12:05:14,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531834523] [2022-12-13 12:05:14,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:14,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 12:05:14,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:14,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 12:05:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=4850, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 12:05:14,522 INFO L87 Difference]: Start difference. First operand 1056 states and 1341 transitions. Second operand has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:05:25,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:05:25,977 INFO L93 Difference]: Finished difference Result 2614 states and 3358 transitions. [2022-12-13 12:05:25,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-12-13 12:05:25,978 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-12-13 12:05:25,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:05:25,981 INFO L225 Difference]: With dead ends: 2614 [2022-12-13 12:05:25,981 INFO L226 Difference]: Without dead ends: 2389 [2022-12-13 12:05:25,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4406 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1469, Invalid=14533, Unknown=0, NotChecked=0, Total=16002 [2022-12-13 12:05:25,982 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1372 mSDsluCounter, 5574 mSDsCounter, 0 mSdLazyCounter, 7806 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 5756 SdHoareTripleChecker+Invalid, 8032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 7806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-13 12:05:25,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 5756 Invalid, 8032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 7806 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-13 12:05:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2022-12-13 12:05:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1062. [2022-12-13 12:05:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1021 states have (on average 1.268364348677767) internal successors, (1295), 1026 states have internal predecessors, (1295), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:05:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1347 transitions. [2022-12-13 12:05:27,066 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1347 transitions. Word has length 78 [2022-12-13 12:05:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:05:27,066 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1347 transitions. [2022-12-13 12:05:27,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.328767123287671) internal successors, (170), 72 states have internal predecessors, (170), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:05:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1347 transitions. [2022-12-13 12:05:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 12:05:27,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:05:27,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2022-12-13 12:05:27,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-13 12:05:27,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:27,273 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:05:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:05:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1562188599, now seen corresponding path program 5 times [2022-12-13 12:05:27,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:05:27,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525414765] [2022-12-13 12:05:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:05:27,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:05:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:27,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:05:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:05:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:05:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-13 12:05:27,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:05:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525414765] [2022-12-13 12:05:27,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525414765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:05:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291027446] [2022-12-13 12:05:27,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:05:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:05:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:05:27,551 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:05:27,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-13 12:05:48,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 12:05:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:05:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 12:05:48,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:05:48,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 12:05:49,538 INFO L321 Elim1Store]: treesize reduction 38, result has 47.9 percent of original size [2022-12-13 12:05:49,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 70 [2022-12-13 12:05:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 9 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 12:05:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:05:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 52 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-13 12:05:51,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291027446] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:05:51,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:05:51,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 32, 21] total 65 [2022-12-13 12:05:51,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680243627] [2022-12-13 12:05:51,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:05:51,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-12-13 12:05:51,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:05:51,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-12-13 12:05:51,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3874, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 12:05:51,489 INFO L87 Difference]: Start difference. First operand 1062 states and 1347 transitions. Second operand has 65 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:06:01,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 12:06:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:06:49,864 INFO L93 Difference]: Finished difference Result 8623 states and 11287 transitions. [2022-12-13 12:06:49,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 227 states. [2022-12-13 12:06:49,865 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 80 [2022-12-13 12:06:49,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:06:49,872 INFO L225 Difference]: With dead ends: 8623 [2022-12-13 12:06:49,872 INFO L226 Difference]: Without dead ends: 7390 [2022-12-13 12:06:49,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26026 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=6474, Invalid=71646, Unknown=0, NotChecked=0, Total=78120 [2022-12-13 12:06:49,878 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 6579 mSDsluCounter, 8991 mSDsCounter, 0 mSdLazyCounter, 15679 mSolverCounterSat, 1798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6579 SdHoareTripleChecker+Valid, 9304 SdHoareTripleChecker+Invalid, 17477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1798 IncrementalHoareTripleChecker+Valid, 15679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-12-13 12:06:49,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6579 Valid, 9304 Invalid, 17477 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1798 Valid, 15679 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2022-12-13 12:06:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2022-12-13 12:06:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 1376. [2022-12-13 12:06:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1335 states have (on average 1.2786516853932584) internal successors, (1707), 1340 states have internal predecessors, (1707), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:06:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1759 transitions. [2022-12-13 12:06:51,312 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1759 transitions. Word has length 80 [2022-12-13 12:06:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:06:51,312 INFO L495 AbstractCegarLoop]: Abstraction has 1376 states and 1759 transitions. [2022-12-13 12:06:51,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 63 states have (on average 2.634920634920635) internal successors, (166), 62 states have internal predecessors, (166), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:06:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1759 transitions. [2022-12-13 12:06:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 12:06:51,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:06:51,314 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-12-13 12:06:51,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-13 12:06:51,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:06:51,515 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:06:51,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:06:51,516 INFO L85 PathProgramCache]: Analyzing trace with hash 216048157, now seen corresponding path program 21 times [2022-12-13 12:06:51,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:06:51,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178711890] [2022-12-13 12:06:51,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:06:51,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:06:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:51,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:06:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:51,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:06:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:06:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 12:06:51,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:06:51,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178711890] [2022-12-13 12:06:51,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178711890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:06:51,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511789144] [2022-12-13 12:06:51,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:06:51,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:06:51,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:06:51,927 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:06:51,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-13 12:06:56,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 12:06:56,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:06:56,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-13 12:06:56,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:06:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-13 12:06:57,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:06:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-13 12:06:57,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511789144] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:06:57,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:06:57,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 16] total 46 [2022-12-13 12:06:57,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112540986] [2022-12-13 12:06:57,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:06:57,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 12:06:57,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:06:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 12:06:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 12:06:57,719 INFO L87 Difference]: Start difference. First operand 1376 states and 1759 transitions. Second operand has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:07:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:07:11,021 INFO L93 Difference]: Finished difference Result 5446 states and 7049 transitions. [2022-12-13 12:07:11,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-12-13 12:07:11,022 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 81 [2022-12-13 12:07:11,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:07:11,026 INFO L225 Difference]: With dead ends: 5446 [2022-12-13 12:07:11,026 INFO L226 Difference]: Without dead ends: 4598 [2022-12-13 12:07:11,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1337, Invalid=11319, Unknown=0, NotChecked=0, Total=12656 [2022-12-13 12:07:11,028 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 2980 mSDsluCounter, 5989 mSDsCounter, 0 mSdLazyCounter, 4585 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2984 SdHoareTripleChecker+Valid, 6300 SdHoareTripleChecker+Invalid, 5055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 4585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:07:11,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2984 Valid, 6300 Invalid, 5055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 4585 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-13 12:07:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4598 states. [2022-12-13 12:07:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4598 to 1488. [2022-12-13 12:07:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1447 states have (on average 1.2902557014512785) internal successors, (1867), 1452 states have internal predecessors, (1867), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:07:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1919 transitions. [2022-12-13 12:07:12,687 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1919 transitions. Word has length 81 [2022-12-13 12:07:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:07:12,687 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 1919 transitions. [2022-12-13 12:07:12,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:07:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1919 transitions. [2022-12-13 12:07:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 12:07:12,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:07:12,688 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 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] [2022-12-13 12:07:12,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-13 12:07:12,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:07:12,889 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:07:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:07:12,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1864601601, now seen corresponding path program 5 times [2022-12-13 12:07:12,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:07:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18376507] [2022-12-13 12:07:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:07:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:07:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:13,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:07:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:13,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:07:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:07:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-13 12:07:13,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:07:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18376507] [2022-12-13 12:07:13,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18376507] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:07:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161811534] [2022-12-13 12:07:13,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 12:07:13,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:07:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:07:13,175 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:07:13,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-13 12:09:59,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 12:09:59,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:09:59,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 12:09:59,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:09:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 78 proven. 38 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 12:09:59,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:10:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 78 proven. 38 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 12:10:00,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161811534] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:10:00,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:10:00,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-12-13 12:10:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706410813] [2022-12-13 12:10:00,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:10:00,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 12:10:00,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:10:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 12:10:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 12:10:00,146 INFO L87 Difference]: Start difference. First operand 1488 states and 1919 transitions. Second operand has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:10:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:10:04,256 INFO L93 Difference]: Finished difference Result 2140 states and 2750 transitions. [2022-12-13 12:10:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 12:10:04,257 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 82 [2022-12-13 12:10:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:10:04,258 INFO L225 Difference]: With dead ends: 2140 [2022-12-13 12:10:04,258 INFO L226 Difference]: Without dead ends: 1816 [2022-12-13 12:10:04,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=2769, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 12:10:04,259 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 285 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 2810 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 12:10:04,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 2810 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 12:10:04,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2022-12-13 12:10:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1488. [2022-12-13 12:10:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1447 states have (on average 1.2888735314443676) internal successors, (1865), 1452 states have internal predecessors, (1865), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:10:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 1917 transitions. [2022-12-13 12:10:05,762 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 1917 transitions. Word has length 82 [2022-12-13 12:10:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:10:05,762 INFO L495 AbstractCegarLoop]: Abstraction has 1488 states and 1917 transitions. [2022-12-13 12:10:05,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5) internal successors, (126), 35 states have internal predecessors, (126), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:10:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 1917 transitions. [2022-12-13 12:10:05,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-13 12:10:05,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:10:05,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:10:05,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-13 12:10:05,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:10:05,965 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:10:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:10:05,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1857046752, now seen corresponding path program 2 times [2022-12-13 12:10:05,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:10:05,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314620591] [2022-12-13 12:10:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:10:05,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:10:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:10:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:10:06,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 12:10:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-12-13 12:10:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-12-13 12:10:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-12-13 12:10:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 26 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 12:10:06,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:10:06,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314620591] [2022-12-13 12:10:06,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314620591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:10:06,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673700955] [2022-12-13 12:10:06,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:10:06,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:10:06,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:10:06,259 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:10:06,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-13 12:10:06,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:10:06,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:10:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 12:10:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:10:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 12:10:06,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:10:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-12-13 12:10:06,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673700955] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:10:06,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:10:06,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-12-13 12:10:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547806453] [2022-12-13 12:10:06,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:10:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 12:10:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:10:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 12:10:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-12-13 12:10:06,767 INFO L87 Difference]: Start difference. First operand 1488 states and 1917 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 12:10:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:10:09,288 INFO L93 Difference]: Finished difference Result 1705 states and 2184 transitions. [2022-12-13 12:10:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:10:09,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 87 [2022-12-13 12:10:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:10:09,290 INFO L225 Difference]: With dead ends: 1705 [2022-12-13 12:10:09,290 INFO L226 Difference]: Without dead ends: 1462 [2022-12-13 12:10:09,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 12:10:09,291 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 191 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 12:10:09,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 840 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 12:10:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-12-13 12:10:11,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1462. [2022-12-13 12:10:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1421 states have (on average 1.2913441238564392) internal successors, (1835), 1426 states have internal predecessors, (1835), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-13 12:10:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 1887 transitions. [2022-12-13 12:10:11,018 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 1887 transitions. Word has length 87 [2022-12-13 12:10:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:10:11,019 INFO L495 AbstractCegarLoop]: Abstraction has 1462 states and 1887 transitions. [2022-12-13 12:10:11,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 25 states have internal predecessors, (91), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-12-13 12:10:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 1887 transitions. [2022-12-13 12:10:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-13 12:10:11,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:10:11,020 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 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] [2022-12-13 12:10:11,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-12-13 12:10:11,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:10:11,221 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:10:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:10:11,222 INFO L85 PathProgramCache]: Analyzing trace with hash -57160833, now seen corresponding path program 22 times [2022-12-13 12:10:11,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:10:11,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36065179] [2022-12-13 12:10:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:10:11,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:10:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:12,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 12:10:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:12,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 12:10:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:10:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 12:10:12,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:10:12,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36065179] [2022-12-13 12:10:12,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36065179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 12:10:12,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607518644] [2022-12-13 12:10:12,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 12:10:12,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:10:12,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:10:12,387 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:10:12,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63dacaba-d40f-43f3-a1d6-1ee2ecba7bf1/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-13 12:10:12,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 12:10:12,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:10:12,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 12:10:12,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:10:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 6 proven. 95 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 12:10:12,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:10:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-13 12:10:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607518644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:10:13,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 12:10:13,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 16] total 58 [2022-12-13 12:10:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964354299] [2022-12-13 12:10:13,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 12:10:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 12:10:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:10:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 12:10:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3117, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 12:10:13,540 INFO L87 Difference]: Start difference. First operand 1462 states and 1887 transitions. Second operand has 58 states, 58 states have (on average 2.6206896551724137) internal successors, (152), 58 states have internal predecessors, (152), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:10:39,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []