./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested3-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested3-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF --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 0397e1839c0d761fe403b06501425acc9e7bddc9f103e53ae177509d148aabf4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:31:50,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:31:50,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:31:50,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:31:50,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:31:50,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:31:50,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:31:50,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:31:50,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:31:50,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:31:50,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:31:50,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:31:50,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:31:50,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:31:50,654 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:31:50,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:31:50,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:31:50,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:31:50,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:31:50,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:31:50,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:31:50,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:31:50,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:31:50,669 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:31:50,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:31:50,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:31:50,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:31:50,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:31:50,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:31:50,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:31:50,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:31:50,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:31:50,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:31:50,680 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:31:50,682 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:31:50,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:31:50,683 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:31:50,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:31:50,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:31:50,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:31:50,686 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:31:50,687 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:31:50,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:31:50,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:31:50,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:31:50,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:31:50,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:31:50,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:31:50,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:31:50,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:31:50,717 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:31:50,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:31:50,717 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:31:50,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:31:50,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:31:50,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:31:50,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:31:50,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:31:50,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:31:50,719 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:31:50,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:31:50,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:31:50,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:31:50,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:31:50,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:31:50,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:31:50,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:31:50,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:31:50,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:31:50,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:31:50,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:31:50,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:31:50,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:31:50,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:31:50,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:31:50,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:31:50,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0397e1839c0d761fe403b06501425acc9e7bddc9f103e53ae177509d148aabf4 [2021-11-20 05:31:50,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:31:50,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:31:50,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:31:50,990 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:31:50,991 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:31:50,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/loops-crafted-1/nested3-2.c [2021-11-20 05:31:51,058 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/data/97ed45d6f/1055852f7bf14630943405cb6202c8be/FLAGa33da4e78 [2021-11-20 05:31:51,521 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:31:51,522 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/sv-benchmarks/c/loops-crafted-1/nested3-2.c [2021-11-20 05:31:51,534 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/data/97ed45d6f/1055852f7bf14630943405cb6202c8be/FLAGa33da4e78 [2021-11-20 05:31:51,885 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/data/97ed45d6f/1055852f7bf14630943405cb6202c8be [2021-11-20 05:31:51,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:31:51,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:31:51,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:31:51,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:31:51,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:31:51,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:31:51" (1/1) ... [2021-11-20 05:31:51,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc8d543 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:51, skipping insertion in model container [2021-11-20 05:31:51,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:31:51" (1/1) ... [2021-11-20 05:31:51,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:31:51,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:31:52,110 WARN L230 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_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2021-11-20 05:31:52,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:31:52,133 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:31:52,143 WARN L230 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_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/sv-benchmarks/c/loops-crafted-1/nested3-2.c[321,334] [2021-11-20 05:31:52,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:31:52,158 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:31:52,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52 WrapperNode [2021-11-20 05:31:52,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:31:52,160 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:31:52,160 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:31:52,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:31:52,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,204 INFO L137 Inliner]: procedures = 12, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-11-20 05:31:52,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:31:52,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:31:52,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:31:52,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:31:52,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:31:52,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:31:52,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:31:52,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:31:52,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (1/1) ... [2021-11-20 05:31:52,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:31:52,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:52,280 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:31:52,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:31:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:31:52,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:31:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:31:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:31:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:31:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:31:52,402 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:31:52,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:31:52,598 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:31:52,604 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:31:52,604 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 05:31:52,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:31:52 BoogieIcfgContainer [2021-11-20 05:31:52,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:31:52,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:31:52,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:31:52,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:31:52,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:31:51" (1/3) ... [2021-11-20 05:31:52,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636fd500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:31:52, skipping insertion in model container [2021-11-20 05:31:52,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:31:52" (2/3) ... [2021-11-20 05:31:52,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636fd500 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:31:52, skipping insertion in model container [2021-11-20 05:31:52,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:31:52" (3/3) ... [2021-11-20 05:31:52,636 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.c [2021-11-20 05:31:52,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:31:52,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 05:31:52,752 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:31:52,761 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:31:52,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 05:31:52,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:31:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 05:31:52,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:52,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:52,802 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:52,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1839857593, now seen corresponding path program 1 times [2021-11-20 05:31:52,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147447811] [2021-11-20 05:31:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:52,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:52,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:52,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147447811] [2021-11-20 05:31:52,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147447811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:52,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:52,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:31:52,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358850017] [2021-11-20 05:31:52,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:52,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:31:52,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:31:52,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:31:52,993 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 15 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-20 05:31:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:53,014 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2021-11-20 05:31:53,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:31:53,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2021-11-20 05:31:53,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:53,025 INFO L225 Difference]: With dead ends: 38 [2021-11-20 05:31:53,025 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 05:31:53,028 INFO L932 BasicCegarLoop]: 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 [2021-11-20 05:31:53,033 INFO L933 BasicCegarLoop]: 24 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, 24 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 [2021-11-20 05:31:53,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:53,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 05:31:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 05:31:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:31:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-20 05:31:53,074 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 7 [2021-11-20 05:31:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:53,075 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-20 05:31:53,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-20 05:31:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-20 05:31:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 05:31:53,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:53,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:53,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:31:53,077 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1810304921, now seen corresponding path program 1 times [2021-11-20 05:31:53,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:53,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91543027] [2021-11-20 05:31:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:53,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:53,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91543027] [2021-11-20 05:31:53,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91543027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:53,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:53,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:31:53,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114708050] [2021-11-20 05:31:53,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:53,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:31:53,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:31:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:53,174 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-20 05:31:53,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:53,199 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-11-20 05:31:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:31:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2021-11-20 05:31:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:53,201 INFO L225 Difference]: With dead ends: 30 [2021-11-20 05:31:53,201 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 05:31:53,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:53,204 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:53,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 37 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 05:31:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2021-11-20 05:31:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:31:53,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-11-20 05:31:53,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 7 [2021-11-20 05:31:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:53,221 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-11-20 05:31:53,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2021-11-20 05:31:53,223 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-11-20 05:31:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 05:31:53,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:53,228 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:53,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:31:53,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 300961951, now seen corresponding path program 1 times [2021-11-20 05:31:53,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:53,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098961008] [2021-11-20 05:31:53,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:53,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:53,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098961008] [2021-11-20 05:31:53,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098961008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:53,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:53,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:31:53,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040620428] [2021-11-20 05:31:53,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:53,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:31:53,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:31:53,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:53,326 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-20 05:31:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:53,352 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-20 05:31:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:31:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 8 [2021-11-20 05:31:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:53,354 INFO L225 Difference]: With dead ends: 35 [2021-11-20 05:31:53,354 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 05:31:53,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:53,356 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:53,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 05:31:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-11-20 05:31:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:31:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-20 05:31:53,362 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 8 [2021-11-20 05:31:53,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:53,362 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-20 05:31:53,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-11-20 05:31:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-20 05:31:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:31:53,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:53,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:53,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 05:31:53,364 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash 766069286, now seen corresponding path program 1 times [2021-11-20 05:31:53,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:53,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326792621] [2021-11-20 05:31:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:53,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:53,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:53,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326792621] [2021-11-20 05:31:53,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326792621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:31:53,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:31:53,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:31:53,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120382113] [2021-11-20 05:31:53,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:31:53,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:31:53,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:53,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:31:53,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:53,464 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-20 05:31:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:53,482 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-20 05:31:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:31:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 9 [2021-11-20 05:31:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:53,487 INFO L225 Difference]: With dead ends: 35 [2021-11-20 05:31:53,488 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 05:31:53,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:31:53,491 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:53,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 35 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 05:31:53,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-20 05:31:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:31:53,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-20 05:31:53,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-11-20 05:31:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:53,509 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-20 05:31:53,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-20 05:31:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-20 05:31:53,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 05:31:53,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:53,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:53,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 05:31:53,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:53,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1993625471, now seen corresponding path program 1 times [2021-11-20 05:31:53,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:53,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191484332] [2021-11-20 05:31:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:53,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:53,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:53,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191484332] [2021-11-20 05:31:53,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191484332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:31:53,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513370803] [2021-11-20 05:31:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:53,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:53,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:53,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:53,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:31:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:31:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:53,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:31:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:53,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513370803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:31:53,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:31:53,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 05:31:53,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545371413] [2021-11-20 05:31:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:31:53,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 05:31:53,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 05:31:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:31:53,792 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-11-20 05:31:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:53,844 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-11-20 05:31:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:31:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 10 [2021-11-20 05:31:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:53,846 INFO L225 Difference]: With dead ends: 39 [2021-11-20 05:31:53,847 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 05:31:53,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:31:53,852 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:53,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:31:53,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 05:31:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-11-20 05:31:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:31:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-20 05:31:53,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2021-11-20 05:31:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:53,858 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-20 05:31:53,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2021-11-20 05:31:53,859 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-20 05:31:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:31:53,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:53,859 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:53,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:31:54,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:54,070 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 775784678, now seen corresponding path program 2 times [2021-11-20 05:31:54,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052560052] [2021-11-20 05:31:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:54,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:54,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:54,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:54,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052560052] [2021-11-20 05:31:54,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052560052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:31:54,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927212577] [2021-11-20 05:31:54,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:31:54,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:54,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:54,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:54,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:31:54,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:31:54,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:31:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:31:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:54,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:31:54,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 05:31:54,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927212577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:31:54,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:31:54,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 14 [2021-11-20 05:31:54,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113375974] [2021-11-20 05:31:54,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:31:54,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 05:31:54,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:54,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 05:31:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-20 05:31:54,599 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:31:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:54,898 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2021-11-20 05:31:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 05:31:54,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-20 05:31:54,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:54,901 INFO L225 Difference]: With dead ends: 74 [2021-11-20 05:31:54,901 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 05:31:54,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:31:54,903 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 29 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:54,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 432 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:31:54,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 05:31:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2021-11-20 05:31:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:31:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-20 05:31:54,927 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2021-11-20 05:31:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:54,927 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-20 05:31:54,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:31:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-20 05:31:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:31:54,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:54,929 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:54,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 05:31:55,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:55,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1692448319, now seen corresponding path program 3 times [2021-11-20 05:31:55,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:55,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182490326] [2021-11-20 05:31:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:55,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:55,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:55,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182490326] [2021-11-20 05:31:55,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182490326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:31:55,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794462125] [2021-11-20 05:31:55,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:31:55,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:55,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:55,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:31:55,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 05:31:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:31:55,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 05:31:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:55,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:31:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:55,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794462125] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:31:55,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:31:55,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-11-20 05:31:55,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883631020] [2021-11-20 05:31:55,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:31:55,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 05:31:55,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:55,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 05:31:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:31:55,602 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2021-11-20 05:31:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:31:56,183 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2021-11-20 05:31:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 05:31:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 [2021-11-20 05:31:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:31:56,186 INFO L225 Difference]: With dead ends: 67 [2021-11-20 05:31:56,187 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 05:31:56,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=230, Unknown=0, NotChecked=0, Total=380 [2021-11-20 05:31:56,188 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:31:56,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 120 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:31:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 05:31:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-11-20 05:31:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:31:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-11-20 05:31:56,196 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 14 [2021-11-20 05:31:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:31:56,197 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-11-20 05:31:56,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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) [2021-11-20 05:31:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-11-20 05:31:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 05:31:56,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:31:56,198 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:31:56,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:31:56,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:31:56,402 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:31:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:31:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1368038465, now seen corresponding path program 4 times [2021-11-20 05:31:56,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:31:56,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483698243] [2021-11-20 05:31:56,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:31:56,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:31:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:31:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:56,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:31:56,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483698243] [2021-11-20 05:31:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483698243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:31:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781342132] [2021-11-20 05:31:56,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 05:31:56,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:31:56,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:31:56,741 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:31:56,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:31:56,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 05:31:56,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:31:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 05:31:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:31:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:56,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:31:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:31:57,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781342132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:31:57,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:31:57,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-20 05:31:57,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866488894] [2021-11-20 05:31:57,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:31:57,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 05:31:57,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:31:57,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 05:31:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=647, Unknown=0, NotChecked=0, Total=930 [2021-11-20 05:31:57,509 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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) [2021-11-20 05:32:14,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:32:14,578 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2021-11-20 05:32:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 05:32:14,579 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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 22 [2021-11-20 05:32:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:32:14,580 INFO L225 Difference]: With dead ends: 90 [2021-11-20 05:32:14,580 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 05:32:14,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=686, Invalid=1206, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 05:32:14,582 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:32:14,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 256 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:32:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 05:32:14,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-11-20 05:32:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:32:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-20 05:32:14,593 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 22 [2021-11-20 05:32:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:32:14,593 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-20 05:32:14,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 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) [2021-11-20 05:32:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-20 05:32:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 05:32:14,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:32:14,595 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:32:14,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:32:14,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:14,821 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:32:14,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:32:14,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1187921599, now seen corresponding path program 5 times [2021-11-20 05:32:14,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:32:14,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180568205] [2021-11-20 05:32:14,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:32:14,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:32:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:32:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:15,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:32:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180568205] [2021-11-20 05:32:15,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180568205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:32:15,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125120129] [2021-11-20 05:32:15,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 05:32:15,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:32:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:32:15,658 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:32:15,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:32:27,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-11-20 05:32:27,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:32:27,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-20 05:32:27,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:32:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:27,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:32:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:32:29,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125120129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:32:29,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:32:29,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2021-11-20 05:32:29,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642150148] [2021-11-20 05:32:29,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:32:29,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-20 05:32:29,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:32:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-20 05:32:29,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=2823, Unknown=0, NotChecked=0, Total=3906 [2021-11-20 05:32:29,466 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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) [2021-11-20 05:39:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:39:25,028 INFO L93 Difference]: Finished difference Result 138 states and 184 transitions. [2021-11-20 05:39:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-20 05:39:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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 38 [2021-11-20 05:39:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:39:25,030 INFO L225 Difference]: With dead ends: 138 [2021-11-20 05:39:25,030 INFO L226 Difference]: Without dead ends: 87 [2021-11-20 05:39:25,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 417.2s TimeCoverageRelationStatistics Valid=2887, Invalid=5458, Unknown=27, NotChecked=0, Total=8372 [2021-11-20 05:39:25,036 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:39:25,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 543 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 05:39:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-20 05:39:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-11-20 05:39:25,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 79 states have (on average 1.0886075949367089) internal successors, (86), 81 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 05:39:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-11-20 05:39:25,048 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 38 [2021-11-20 05:39:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:39:25,048 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-11-20 05:39:25,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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) [2021-11-20 05:39:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-11-20 05:39:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 05:39:25,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:39:25,051 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:39:25,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:39:25,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:25,257 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:39:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:39:25,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1178465471, now seen corresponding path program 6 times [2021-11-20 05:39:25,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:39:25,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878867783] [2021-11-20 05:39:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:39:25,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:39:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:39:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:39:27,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:39:27,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878867783] [2021-11-20 05:39:27,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878867783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 05:39:27,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102721788] [2021-11-20 05:39:27,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 05:39:27,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:39:27,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:39:27,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:39:27,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef08b5d8-02ad-4476-b8c0-5994f28d8efc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:41:08,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-11-20 05:41:08,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:41:08,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-20 05:41:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:41:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:41:09,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:41:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:41:36,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102721788] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:41:36,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 05:41:36,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 67] total 130 [2021-11-20 05:41:36,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513106272] [2021-11-20 05:41:36,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 05:41:36,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-20 05:41:36,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:41:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-20 05:41:36,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4288, Invalid=12481, Unknown=1, NotChecked=0, Total=16770 [2021-11-20 05:41:36,168 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 130 states, 129 states have (on average 1.054263565891473) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:41:40,390 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (+ 21 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse2 (mod (+ 30 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse5 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 8) 4294967296)) (.cse15 (mod (+ 35 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse0 (mod (+ 22 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse3 (mod (+ 29 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse8 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 28) 4294967296)) (.cse26 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 18) 4294967296)) (.cse33 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 55) 4294967296)) (.cse6 (mod (+ 7 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse23 (mod (+ 6 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse14 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 34) 4294967296)) (.cse38 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 33) 4294967296)) (.cse9 (mod (+ 3 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse7 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 27) 4294967296)) (.cse35 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 26) 4294967296)) (.cse30 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 15) 4294967296)) (.cse34 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 25) 4294967296)) (.cse16 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 48) 4294967296)) (.cse47 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 24) 4294967296)) (.cse28 (mod (+ 23 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse37 (mod (+ 32 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse13 (mod (+ 31 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse36 (mod (+ 56 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse43 (mod (+ 2 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse50 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 1) 4294967296)) (.cse21 (mod (+ 41 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse42 (mod (+ 51 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse45 (mod (+ 52 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse25 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 17) 4294967296)) (.cse44 (mod (+ 16 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse32 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 54) 4294967296)) (.cse46 (mod (+ 53 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse52 (mod (+ 42 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse18 (mod (+ 9 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse19 (mod (+ 59 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse29 (mod (+ 14 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse54 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 10) 4294967296)) (.cse12 (mod (+ 44 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse53 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 43) 4294967296)) (.cse41 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 50) 4294967296)) (.cse48 (mod (+ 49 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse55 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 60) 4294967296)) (.cse4 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 20) 4294967296)) (.cse31 (mod (+ 19 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse22 (mod (+ 40 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse10 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4) 4294967296)) (.cse24 (mod (+ 5 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse11 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 45) 4294967296)) (.cse40 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 38) 4294967296)) (.cse58 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 39) 4294967296)) (.cse27 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 36) 4294967296)) (.cse39 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 37) 4294967296)) (.cse51 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (.cse56 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 13) 4294967296)) (.cse59 (mod (+ 46 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse17 (mod (+ 47 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse49 (mod (+ 57 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (.cse20 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 58) 4294967296)) (.cse57 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 11) 4294967296)) (.cse60 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 12) 4294967296))) (and (or (< .cse0 268435455) (<= 268435455 .cse1)) (or (< .cse2 268435455) (<= 268435455 .cse3)) (or (<= 268435455 .cse4) (< .cse1 268435455)) (or (< .cse5 268435455) (<= 268435455 .cse6)) (or (<= 268435455 .cse7) (< .cse8 268435455)) (or (<= 268435455 .cse9) (< .cse10 268435455)) (or (< .cse11 268435455) (<= 268435455 .cse12)) (or (<= 268435455 .cse2) (< .cse13 268435455)) (or (<= 268435455 .cse14) (< .cse15 268435455)) (or (< .cse16 268435455) (<= 268435455 .cse17)) (or (< .cse18 268435455) (<= 268435455 .cse5)) (or (< .cse19 268435455) (<= 268435455 .cse20)) (or (< .cse21 268435455) (<= 268435455 .cse22)) (or (< .cse23 268435455) (<= 268435455 .cse24)) (or (<= 268435455 .cse25) (< .cse26 268435455)) (or (<= 268435455 .cse15) (< .cse27 268435455)) (or (< .cse28 268435455) (<= 268435455 .cse0)) (or (< .cse3 268435455) (<= 268435455 .cse8)) (or (<= 268435455 .cse29) (< .cse30 268435455)) (or (< .cse31 268435455) (<= 268435455 .cse26)) (or (<= 268435455 .cse32) (< .cse33 268435455)) (or (<= 268435455 .cse34) (< .cse35 268435455)) (or (< .cse36 268435455) (<= 268435455 .cse33)) (or (<= 268435455 .cse37) (< .cse38 268435455)) (or (< .cse6 268435455) (<= 268435455 .cse23)) (or (< .cse14 268435455) (<= 268435455 .cse38)) (or (<= 268435455 .cse39) (< .cse40 268435455)) (or (<= 268435455 .cse41) (< .cse42 268435455)) (or (< .cse9 268435455) (<= 268435455 .cse43)) (or (< .cse7 268435455) (<= 268435455 .cse35)) (or (< .cse44 268435455) (<= 268435455 .cse30)) (or (<= 268435455 .cse45) (< .cse46 268435455)) (or (< .cse34 268435455) (<= 268435455 .cse47)) (or (<= 268435455 .cse16) (< .cse48 268435455)) (or (< .cse47 268435455) (<= 268435455 .cse28)) (or (< .cse37 268435455) (<= 268435455 .cse13)) (or (<= 268435455 .cse36) (< .cse49 268435455)) (or (< .cse43 268435455) (<= 268435455 .cse50)) (or (<= 268435455 .cse51) (< .cse50 268435455)) (or (< .cse52 268435455) (<= 268435455 .cse21)) (or (<= 268435455 .cse42) (< .cse45 268435455)) (or (< .cse25 268435455) (<= 268435455 .cse44)) (or (< .cse32 268435455) (<= 268435455 .cse46)) (or (< .cse53 268435455) (<= 268435455 .cse52)) (or (< .cse54 268435455) (<= 268435455 .cse18)) (or (<= 268435455 .cse19) (< .cse55 268435455)) (or (<= 268435455 .cse56) (< .cse29 268435455)) (or (<= 268435455 .cse54) (< .cse57 268435455)) (or (< .cse12 268435455) (<= 268435455 .cse53)) (or (< .cse41 268435455) (<= 268435455 .cse48)) (or (< (mod (+ |c_ULTIMATE.start_main_~z~0#1| 61) 4294967296) 268435455) (<= 268435455 .cse55)) (or (< .cse4 268435455) (<= 268435455 .cse31)) (or (<= 268435455 .cse58) (< .cse22 268435455)) (or (<= 268435455 .cse10) (< .cse24 268435455)) (or (<= 268435455 .cse11) (< .cse59 268435455)) (or (<= 268435455 .cse40) (< .cse58 268435455)) (or (<= 268435455 .cse27) (< .cse39 268435455)) (or (= (mod |c_ULTIMATE.start_main_~z~0#1| 4) 0) (< .cse51 268435455)) (or (<= 268435455 .cse60) (< .cse56 268435455)) (or (<= 268435455 .cse59) (< .cse17 268435455)) (or (<= 268435455 .cse49) (< .cse20 268435455)) (or (<= 268435455 .cse57) (< .cse60 268435455)))) is different from false