./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/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 f1f34940ecf685c2c1201858b264ccb53eb3034d3cb9952a1b49bb437c42dde1 --- 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 12:44:43,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 12:44:43,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 12:44:44,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 12:44:44,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 12:44:44,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 12:44:44,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 12:44:44,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 12:44:44,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 12:44:44,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 12:44:44,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 12:44:44,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 12:44:44,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 12:44:44,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 12:44:44,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 12:44:44,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 12:44:44,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 12:44:44,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 12:44:44,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 12:44:44,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 12:44:44,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 12:44:44,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 12:44:44,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 12:44:44,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 12:44:44,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 12:44:44,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 12:44:44,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 12:44:44,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 12:44:44,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 12:44:44,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 12:44:44,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 12:44:44,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 12:44:44,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 12:44:44,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 12:44:44,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 12:44:44,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 12:44:44,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 12:44:44,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 12:44:44,073 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 12:44:44,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 12:44:44,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 12:44:44,075 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 12:44:44,095 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 12:44:44,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 12:44:44,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 12:44:44,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 12:44:44,096 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 12:44:44,096 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 12:44:44,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 12:44:44,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 12:44:44,097 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 12:44:44,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 12:44:44,098 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 12:44:44,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 12:44:44,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 12:44:44,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 12:44:44,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 12:44:44,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 12:44:44,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 12:44:44,099 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 12:44:44,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 12:44:44,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 12:44:44,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 12:44:44,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 12:44:44,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 12:44:44,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 12:44:44,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:44:44,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 12:44:44,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 12:44:44,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 12:44:44,102 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 12:44:44,102 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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1f34940ecf685c2c1201858b264ccb53eb3034d3cb9952a1b49bb437c42dde1 [2022-12-13 12:44:44,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 12:44:44,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 12:44:44,303 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 12:44:44,304 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 12:44:44,304 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 12:44:44,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i [2022-12-13 12:44:46,962 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 12:44:47,190 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 12:44:47,191 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i [2022-12-13 12:44:47,204 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/data/e17c56d32/2b14e4b19a2848b8a04695a7aca7f835/FLAGbd4563c10 [2022-12-13 12:44:47,217 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/data/e17c56d32/2b14e4b19a2848b8a04695a7aca7f835 [2022-12-13 12:44:47,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 12:44:47,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 12:44:47,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 12:44:47,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 12:44:47,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 12:44:47,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53efe3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47, skipping insertion in model container [2022-12-13 12:44:47,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 12:44:47,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 12:44:47,562 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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i[33021,33034] [2022-12-13 12:44:47,639 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 12:44:47,648 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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i[44590,44603] [2022-12-13 12:44:47,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:44:47,664 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 12:44:47,692 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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i[33021,33034] [2022-12-13 12:44:47,736 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 12:44:47,743 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_4f56bc72-4754-4c77-9ca8-b050e02b1caa/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-1.i[44590,44603] [2022-12-13 12:44:47,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 12:44:47,779 INFO L208 MainTranslator]: Completed translation [2022-12-13 12:44:47,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47 WrapperNode [2022-12-13 12:44:47,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 12:44:47,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 12:44:47,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 12:44:47,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 12:44:47,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,849 INFO L138 Inliner]: procedures = 177, calls = 285, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1022 [2022-12-13 12:44:47,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 12:44:47,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 12:44:47,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 12:44:47,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 12:44:47,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,942 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,956 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 12:44:47,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 12:44:47,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 12:44:47,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 12:44:47,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (1/1) ... [2022-12-13 12:44:47,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 12:44:47,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:47,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 12:44:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 12:44:48,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 12:44:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 12:44:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 12:44:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 12:44:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-13 12:44:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-13 12:44:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 12:44:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 12:44:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 12:44:48,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 12:44:48,186 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 12:44:48,188 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 12:44:49,342 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 12:44:49,347 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 12:44:49,347 INFO L300 CfgBuilder]: Removed 63 assume(true) statements. [2022-12-13 12:44:49,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:44:49 BoogieIcfgContainer [2022-12-13 12:44:49,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 12:44:49,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 12:44:49,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 12:44:49,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 12:44:49,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 12:44:47" (1/3) ... [2022-12-13 12:44:49,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1730afbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:44:49, skipping insertion in model container [2022-12-13 12:44:49,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 12:44:47" (2/3) ... [2022-12-13 12:44:49,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1730afbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 12:44:49, skipping insertion in model container [2022-12-13 12:44:49,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 12:44:49" (3/3) ... [2022-12-13 12:44:49,355 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test3-1.i [2022-12-13 12:44:49,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 12:44:49,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 12:44:49,405 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 12:44:49,410 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;@1370b7cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 12:44:49,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 12:44:49,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 200 states, 187 states have (on average 1.695187165775401) internal successors, (317), 194 states have internal predecessors, (317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 12:44:49,419 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:49,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:49,420 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1311467126, now seen corresponding path program 1 times [2022-12-13 12:44:49,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983578850] [2022-12-13 12:44:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:44:49,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:49,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983578850] [2022-12-13 12:44:49,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983578850] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:49,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:49,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 12:44:49,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117990719] [2022-12-13 12:44:49,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:49,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 12:44:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 12:44:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 12:44:49,568 INFO L87 Difference]: Start difference. First operand has 200 states, 187 states have (on average 1.695187165775401) internal successors, (317), 194 states have internal predecessors, (317), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:49,601 INFO L93 Difference]: Finished difference Result 398 states and 669 transitions. [2022-12-13 12:44:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 12:44:49,603 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-13 12:44:49,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:49,610 INFO L225 Difference]: With dead ends: 398 [2022-12-13 12:44:49,610 INFO L226 Difference]: Without dead ends: 196 [2022-12-13 12:44:49,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 12:44:49,614 INFO L413 NwaCegarLoop]: 264 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, 264 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 12:44:49,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:44:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-12-13 12:44:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-12-13 12:44:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 184 states have (on average 1.326086956521739) internal successors, (244), 190 states have internal predecessors, (244), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 260 transitions. [2022-12-13 12:44:49,669 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 260 transitions. Word has length 9 [2022-12-13 12:44:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:49,670 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 260 transitions. [2022-12-13 12:44:49,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:49,670 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 260 transitions. [2022-12-13 12:44:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 12:44:49,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:49,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 12:44:49,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1760313746, now seen corresponding path program 1 times [2022-12-13 12:44:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:49,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766429930] [2022-12-13 12:44:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:44:49,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766429930] [2022-12-13 12:44:49,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766429930] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:49,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:49,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:44:49,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55630968] [2022-12-13 12:44:49,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:44:49,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:44:49,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:44:49,832 INFO L87 Difference]: Start difference. First operand 196 states and 260 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:50,158 INFO L93 Difference]: Finished difference Result 429 states and 578 transitions. [2022-12-13 12:44:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:44:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 12:44:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:50,161 INFO L225 Difference]: With dead ends: 429 [2022-12-13 12:44:50,161 INFO L226 Difference]: Without dead ends: 325 [2022-12-13 12:44:50,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 12:44:50,162 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 159 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:50,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 645 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 12:44:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-12-13 12:44:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 198. [2022-12-13 12:44:50,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 186 states have (on average 1.3225806451612903) internal successors, (246), 192 states have internal predecessors, (246), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 262 transitions. [2022-12-13 12:44:50,184 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 262 transitions. Word has length 14 [2022-12-13 12:44:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:50,184 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 262 transitions. [2022-12-13 12:44:50,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 262 transitions. [2022-12-13 12:44:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 12:44:50,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:50,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:50,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 12:44:50,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:50,189 INFO L85 PathProgramCache]: Analyzing trace with hash -803086662, now seen corresponding path program 1 times [2022-12-13 12:44:50,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:50,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545413483] [2022-12-13 12:44:50,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:50,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:50,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:50,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [791516873] [2022-12-13 12:44:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:50,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:50,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:50,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:50,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 12:44:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:44:50,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:44:50,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:50,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545413483] [2022-12-13 12:44:50,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:50,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791516873] [2022-12-13 12:44:50,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791516873] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:50,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:50,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:44:50,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680506605] [2022-12-13 12:44:50,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:44:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:44:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:44:50,784 INFO L87 Difference]: Start difference. First operand 198 states and 262 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:50,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:50,845 INFO L93 Difference]: Finished difference Result 413 states and 551 transitions. [2022-12-13 12:44:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:44:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 12:44:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:50,846 INFO L225 Difference]: With dead ends: 413 [2022-12-13 12:44:50,846 INFO L226 Difference]: Without dead ends: 219 [2022-12-13 12:44:50,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 12:44:50,848 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:50,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 465 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:44:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-13 12:44:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-12-13 12:44:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 206 states have (on average 1.2912621359223302) internal successors, (266), 212 states have internal predecessors, (266), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 282 transitions. [2022-12-13 12:44:50,855 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 282 transitions. Word has length 66 [2022-12-13 12:44:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:50,855 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 282 transitions. [2022-12-13 12:44:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 282 transitions. [2022-12-13 12:44:50,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 12:44:50,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:50,856 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:50,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 12:44:51,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:51,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:51,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash -449998280, now seen corresponding path program 1 times [2022-12-13 12:44:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601694914] [2022-12-13 12:44:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:51,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:51,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:51,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398048882] [2022-12-13 12:44:51,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:51,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:51,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:51,277 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:51,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 12:44:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:44:51,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:44:51,809 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:51,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601694914] [2022-12-13 12:44:51,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:51,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398048882] [2022-12-13 12:44:51,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398048882] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:51,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:51,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:44:51,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377696676] [2022-12-13 12:44:51,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:51,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:44:51,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:51,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:44:51,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:44:51,812 INFO L87 Difference]: Start difference. First operand 218 states and 282 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:51,879 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2022-12-13 12:44:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:44:51,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 12:44:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:51,881 INFO L225 Difference]: With dead ends: 424 [2022-12-13 12:44:51,881 INFO L226 Difference]: Without dead ends: 210 [2022-12-13 12:44:51,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 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 12:44:51,883 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 230 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:51,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 493 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:44:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-13 12:44:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 204. [2022-12-13 12:44:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.2760416666666667) internal successors, (245), 198 states have internal predecessors, (245), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 261 transitions. [2022-12-13 12:44:51,896 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 261 transitions. Word has length 66 [2022-12-13 12:44:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:51,896 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 261 transitions. [2022-12-13 12:44:51,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 261 transitions. [2022-12-13 12:44:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 12:44:51,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:51,899 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:44:51,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 12:44:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:52,101 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1020412346, now seen corresponding path program 1 times [2022-12-13 12:44:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:52,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618377550] [2022-12-13 12:44:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:52,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:52,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834069932] [2022-12-13 12:44:52,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:52,292 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:52,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 12:44:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:52,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:44:52,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:44:52,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:52,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:52,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618377550] [2022-12-13 12:44:52,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:52,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834069932] [2022-12-13 12:44:52,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834069932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:52,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:52,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:44:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460931671] [2022-12-13 12:44:52,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:44:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:44:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:44:52,940 INFO L87 Difference]: Start difference. First operand 204 states and 261 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:53,019 INFO L93 Difference]: Finished difference Result 528 states and 680 transitions. [2022-12-13 12:44:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:44:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-12-13 12:44:53,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:53,022 INFO L225 Difference]: With dead ends: 528 [2022-12-13 12:44:53,022 INFO L226 Difference]: Without dead ends: 328 [2022-12-13 12:44:53,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 12:44:53,024 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 113 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:53,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 544 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:44:53,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-13 12:44:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 310. [2022-12-13 12:44:53,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 298 states have (on average 1.2684563758389262) internal successors, (378), 304 states have internal predecessors, (378), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:53,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 394 transitions. [2022-12-13 12:44:53,042 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 394 transitions. Word has length 66 [2022-12-13 12:44:53,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:53,042 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 394 transitions. [2022-12-13 12:44:53,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 12:44:53,043 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 394 transitions. [2022-12-13 12:44:53,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-13 12:44:53,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:53,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:53,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 12:44:53,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:53,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:53,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:53,249 INFO L85 PathProgramCache]: Analyzing trace with hash 822747892, now seen corresponding path program 1 times [2022-12-13 12:44:53,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:53,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779283700] [2022-12-13 12:44:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:53,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:53,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:53,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825120298] [2022-12-13 12:44:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:53,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:53,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:53,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 12:44:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:53,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:44:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:53,703 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 11 treesize of output 7 [2022-12-13 12:44:53,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 12:44:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:44:53,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:53,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779283700] [2022-12-13 12:44:53,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825120298] [2022-12-13 12:44:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825120298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:53,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:53,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:44:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36309322] [2022-12-13 12:44:53,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:53,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:44:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:44:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:44:53,721 INFO L87 Difference]: Start difference. First operand 310 states and 394 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 12:44:54,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:54,001 INFO L93 Difference]: Finished difference Result 425 states and 551 transitions. [2022-12-13 12:44:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:44:54,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 12:44:54,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:54,004 INFO L225 Difference]: With dead ends: 425 [2022-12-13 12:44:54,004 INFO L226 Difference]: Without dead ends: 404 [2022-12-13 12:44:54,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 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 12:44:54,005 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 103 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:54,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 666 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 12:44:54,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-12-13 12:44:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 312. [2022-12-13 12:44:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 300 states have (on average 1.2666666666666666) internal successors, (380), 306 states have internal predecessors, (380), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 396 transitions. [2022-12-13 12:44:54,013 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 396 transitions. Word has length 81 [2022-12-13 12:44:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:54,014 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 396 transitions. [2022-12-13 12:44:54,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 12:44:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 396 transitions. [2022-12-13 12:44:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 12:44:54,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:54,015 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:54,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 12:44:54,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 12:44:54,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:54,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1168454105, now seen corresponding path program 1 times [2022-12-13 12:44:54,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:54,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570621891] [2022-12-13 12:44:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:54,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:54,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:54,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465226814] [2022-12-13 12:44:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:54,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:54,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:54,268 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:54,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 12:44:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:54,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:44:54,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:44:54,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:54,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:54,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570621891] [2022-12-13 12:44:54,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:54,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465226814] [2022-12-13 12:44:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465226814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:54,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:54,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 12:44:54,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430346123] [2022-12-13 12:44:54,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:54,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 12:44:54,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:54,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 12:44:54,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 12:44:54,676 INFO L87 Difference]: Start difference. First operand 312 states and 396 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:44:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:54,729 INFO L93 Difference]: Finished difference Result 519 states and 682 transitions. [2022-12-13 12:44:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 12:44:54,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-12-13 12:44:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:54,731 INFO L225 Difference]: With dead ends: 519 [2022-12-13 12:44:54,731 INFO L226 Difference]: Without dead ends: 354 [2022-12-13 12:44:54,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 12:44:54,733 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 10 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:54,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 451 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:44:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-12-13 12:44:54,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2022-12-13 12:44:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 340 states have (on average 1.2352941176470589) internal successors, (420), 346 states have internal predecessors, (420), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 436 transitions. [2022-12-13 12:44:54,746 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 436 transitions. Word has length 111 [2022-12-13 12:44:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:54,746 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 436 transitions. [2022-12-13 12:44:54,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:44:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 436 transitions. [2022-12-13 12:44:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 12:44:54,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:54,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:54,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 12:44:54,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 12:44:54,949 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1449251797, now seen corresponding path program 1 times [2022-12-13 12:44:54,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:54,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977756989] [2022-12-13 12:44:54,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:55,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:55,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970372892] [2022-12-13 12:44:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:55,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:55,031 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:55,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 12:44:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 12:44:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 12:44:55,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:55,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:55,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977756989] [2022-12-13 12:44:55,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970372892] [2022-12-13 12:44:55,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970372892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:55,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:55,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:44:55,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532730304] [2022-12-13 12:44:55,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:55,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:44:55,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:55,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:44:55,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:44:55,516 INFO L87 Difference]: Start difference. First operand 352 states and 436 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:44:55,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:55,577 INFO L93 Difference]: Finished difference Result 534 states and 677 transitions. [2022-12-13 12:44:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:44:55,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-12-13 12:44:55,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:55,579 INFO L225 Difference]: With dead ends: 534 [2022-12-13 12:44:55,579 INFO L226 Difference]: Without dead ends: 329 [2022-12-13 12:44:55,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 108 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 12:44:55,580 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 122 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:55,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 577 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:44:55,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-12-13 12:44:55,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 324. [2022-12-13 12:44:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 312 states have (on average 1.2115384615384615) internal successors, (378), 318 states have internal predecessors, (378), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 394 transitions. [2022-12-13 12:44:55,591 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 394 transitions. Word has length 111 [2022-12-13 12:44:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:55,591 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 394 transitions. [2022-12-13 12:44:55,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:44:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 394 transitions. [2022-12-13 12:44:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 12:44:55,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:55,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:55,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 12:44:55,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:55,794 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1962866653, now seen corresponding path program 1 times [2022-12-13 12:44:55,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:55,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635061337] [2022-12-13 12:44:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:55,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:55,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908247412] [2022-12-13 12:44:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:55,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:55,880 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:55,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 12:44:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:44:56,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:44:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:44:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 12:44:56,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:44:56,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:44:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635061337] [2022-12-13 12:44:56,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:44:56,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908247412] [2022-12-13 12:44:56,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908247412] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:44:56,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:44:56,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:44:56,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815776173] [2022-12-13 12:44:56,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:44:56,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:44:56,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:44:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:44:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:44:56,394 INFO L87 Difference]: Start difference. First operand 324 states and 394 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:44:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:44:56,606 INFO L93 Difference]: Finished difference Result 716 states and 892 transitions. [2022-12-13 12:44:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 12:44:56,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-12-13 12:44:56,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:44:56,608 INFO L225 Difference]: With dead ends: 716 [2022-12-13 12:44:56,608 INFO L226 Difference]: Without dead ends: 440 [2022-12-13 12:44:56,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 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 12:44:56,609 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 443 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 12:44:56,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 506 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 12:44:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-13 12:44:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 408. [2022-12-13 12:44:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 396 states have (on average 1.2171717171717171) internal successors, (482), 402 states have internal predecessors, (482), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 12:44:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 498 transitions. [2022-12-13 12:44:56,620 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 498 transitions. Word has length 111 [2022-12-13 12:44:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:44:56,621 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 498 transitions. [2022-12-13 12:44:56,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 12:44:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 498 transitions. [2022-12-13 12:44:56,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-13 12:44:56,622 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:44:56,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:44:56,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 12:44:56,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:56,822 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:44:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:44:56,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1528774636, now seen corresponding path program 1 times [2022-12-13 12:44:56,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:44:56,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487389588] [2022-12-13 12:44:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:44:56,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:44:56,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771476139] [2022-12-13 12:44:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:44:56,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:44:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:44:56,875 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:44:56,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 12:45:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:16,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 12:45:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 12:45:16,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 12:45:16,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487389588] [2022-12-13 12:45:16,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:45:16,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771476139] [2022-12-13 12:45:16,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771476139] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 12:45:16,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 12:45:16,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 12:45:16,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086750970] [2022-12-13 12:45:16,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 12:45:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 12:45:16,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:45:16,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 12:45:16,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 12:45:16,939 INFO L87 Difference]: Start difference. First operand 408 states and 498 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:45:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:45:16,974 INFO L93 Difference]: Finished difference Result 768 states and 945 transitions. [2022-12-13 12:45:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 12:45:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-12-13 12:45:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:45:16,978 INFO L225 Difference]: With dead ends: 768 [2022-12-13 12:45:16,978 INFO L226 Difference]: Without dead ends: 411 [2022-12-13 12:45:16,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 12:45:16,980 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 2 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:45:16,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 725 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:45:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-12-13 12:45:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2022-12-13 12:45:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 398 states have (on average 1.2185929648241205) internal successors, (485), 405 states have internal predecessors, (485), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-13 12:45:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 502 transitions. [2022-12-13 12:45:17,003 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 502 transitions. Word has length 118 [2022-12-13 12:45:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:45:17,004 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 502 transitions. [2022-12-13 12:45:17,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 12:45:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 502 transitions. [2022-12-13 12:45:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-13 12:45:17,005 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:45:17,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:45:17,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 12:45:17,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:17,206 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:45:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2079236494, now seen corresponding path program 1 times [2022-12-13 12:45:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:17,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399795449] [2022-12-13 12:45:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:17,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:45:17,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101507703] [2022-12-13 12:45:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:17,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:17,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:17,239 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:17,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 12:45:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 12:45:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 12:45:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:45:45,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:45:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 12:45:45,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:45,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399795449] [2022-12-13 12:45:45,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:45:45,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101507703] [2022-12-13 12:45:45,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101507703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:45:45,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:45:45,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 12:45:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628781808] [2022-12-13 12:45:45,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:45:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 12:45:45,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:45:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 12:45:45,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 12:45:45,453 INFO L87 Difference]: Start difference. First operand 411 states and 502 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:45:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:45:45,561 INFO L93 Difference]: Finished difference Result 782 states and 967 transitions. [2022-12-13 12:45:45,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 12:45:45,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 120 [2022-12-13 12:45:45,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:45:45,564 INFO L225 Difference]: With dead ends: 782 [2022-12-13 12:45:45,564 INFO L226 Difference]: Without dead ends: 422 [2022-12-13 12:45:45,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2022-12-13 12:45:45,565 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 10 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 12:45:45,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 726 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 12:45:45,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-12-13 12:45:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 420. [2022-12-13 12:45:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 406 states have (on average 1.229064039408867) internal successors, (499), 413 states have internal predecessors, (499), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-13 12:45:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 517 transitions. [2022-12-13 12:45:45,577 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 517 transitions. Word has length 120 [2022-12-13 12:45:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:45:45,578 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 517 transitions. [2022-12-13 12:45:45,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-13 12:45:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 517 transitions. [2022-12-13 12:45:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 12:45:45,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:45:45,579 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:45:45,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 12:45:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:45,779 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:45:45,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1072056788, now seen corresponding path program 2 times [2022-12-13 12:45:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:45,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704331282] [2022-12-13 12:45:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:45,814 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:45:45,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205996466] [2022-12-13 12:45:45,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 12:45:45,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:45,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:45,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 12:45:46,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 12:45:46,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 12:45:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 12:45:46,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 12:45:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 12:45:46,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 12:45:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 12:45:46,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 12:45:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704331282] [2022-12-13 12:45:46,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 12:45:46,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205996466] [2022-12-13 12:45:46,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205996466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 12:45:46,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 12:45:46,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-12-13 12:45:46,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942586203] [2022-12-13 12:45:46,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 12:45:46,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 12:45:46,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 12:45:46,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 12:45:46,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 12:45:46,798 INFO L87 Difference]: Start difference. First operand 420 states and 517 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:45:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 12:45:47,098 INFO L93 Difference]: Finished difference Result 795 states and 985 transitions. [2022-12-13 12:45:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 12:45:47,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-12-13 12:45:47,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 12:45:47,101 INFO L225 Difference]: With dead ends: 795 [2022-12-13 12:45:47,101 INFO L226 Difference]: Without dead ends: 426 [2022-12-13 12:45:47,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-12-13 12:45:47,102 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 14 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 12:45:47,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1658 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 12:45:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-12-13 12:45:47,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2022-12-13 12:45:47,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 410 states have (on average 1.226829268292683) internal successors, (503), 417 states have internal predecessors, (503), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 8 states have call successors, (9) [2022-12-13 12:45:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 520 transitions. [2022-12-13 12:45:47,125 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 520 transitions. Word has length 124 [2022-12-13 12:45:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 12:45:47,125 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 520 transitions. [2022-12-13 12:45:47,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 12:45:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 520 transitions. [2022-12-13 12:45:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-13 12:45:47,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 12:45:47,127 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 12:45:47,136 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 12:45:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:47,328 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 12:45:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 12:45:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1882342572, now seen corresponding path program 3 times [2022-12-13 12:45:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 12:45:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294472301] [2022-12-13 12:45:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 12:45:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 12:45:47,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 12:45:47,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156402443] [2022-12-13 12:45:47,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 12:45:47,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 12:45:47,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 12:45:47,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 12:45:47,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f56bc72-4754-4c77-9ca8-b050e02b1caa/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process