./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/vogal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa --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 d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:26:45,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:26:45,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:26:45,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:26:45,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:26:45,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:26:45,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:26:45,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:26:45,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:26:45,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:26:45,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:26:45,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:26:45,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:26:45,083 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:26:45,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:26:45,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:26:45,088 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:26:45,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:26:45,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:26:45,093 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:26:45,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:26:45,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:26:45,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:26:45,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:26:45,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:26:45,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:26:45,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:26:45,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:26:45,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:26:45,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:26:45,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:26:45,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:26:45,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:26:45,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:26:45,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:26:45,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:26:45,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:26:45,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:26:45,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:26:45,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:26:45,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:26:45,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:26:45,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:26:45,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:26:45,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:26:45,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:26:45,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:26:45,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:26:45,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:26:45,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:26:45,137 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:26:45,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:26:45,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:26:45,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:26:45,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:26:45,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:26:45,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:26:45,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:26:45,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:26:45,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:26:45,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:26:45,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:26:45,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:26:45,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:26:45,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:26:45,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:26:45,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:26:45,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:26:45,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:26:45,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:26:45,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:26:45,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:26:45,141 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:26:45,141 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:26:45,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:26:45,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:26:45,142 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_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 [2021-12-07 00:26:45,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:26:45,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:26:45,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:26:45,350 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:26:45,350 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:26:45,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loops/vogal-2.i [2021-12-07 00:26:45,391 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/data/6907fbe44/1cd743a4237644fdbc9266e45724cb1f/FLAGc60e80273 [2021-12-07 00:26:45,769 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:26:45,769 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/sv-benchmarks/c/loops/vogal-2.i [2021-12-07 00:26:45,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/data/6907fbe44/1cd743a4237644fdbc9266e45724cb1f/FLAGc60e80273 [2021-12-07 00:26:45,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/data/6907fbe44/1cd743a4237644fdbc9266e45724cb1f [2021-12-07 00:26:45,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:26:45,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:26:45,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:26:45,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:26:45,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:26:45,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:45,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62622756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45, skipping insertion in model container [2021-12-07 00:26:45,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:45,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:26:45,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:26:45,915 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_6ab117a5-02c2-4e94-9df9-e657f7bc57de/sv-benchmarks/c/loops/vogal-2.i[808,821] [2021-12-07 00:26:45,931 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:26:45,937 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:26:45,945 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_6ab117a5-02c2-4e94-9df9-e657f7bc57de/sv-benchmarks/c/loops/vogal-2.i[808,821] [2021-12-07 00:26:45,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:26:45,965 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:26:45,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45 WrapperNode [2021-12-07 00:26:45,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:26:45,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:26:45,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:26:45,966 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:26:45,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:45,980 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,003 INFO L137 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2021-12-07 00:26:46,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:26:46,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:26:46,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:26:46,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:26:46,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:26:46,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:26:46,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:26:46,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:26:46,026 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (1/1) ... [2021-12-07 00:26:46,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:26:46,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:46,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:26:46,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:26:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:26:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:26:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:26:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:26:46,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:26:46,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:26:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:26:46,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:26:46,157 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:26:46,159 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:26:46,301 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:26:46,307 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:26:46,307 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-07 00:26:46,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:26:46 BoogieIcfgContainer [2021-12-07 00:26:46,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:26:46,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:26:46,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:26:46,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:26:46,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:26:45" (1/3) ... [2021-12-07 00:26:46,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c326b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:26:46, skipping insertion in model container [2021-12-07 00:26:46,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:26:45" (2/3) ... [2021-12-07 00:26:46,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c326b86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:26:46, skipping insertion in model container [2021-12-07 00:26:46,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:26:46" (3/3) ... [2021-12-07 00:26:46,317 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2021-12-07 00:26:46,323 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:26:46,323 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:26:46,370 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:26:46,377 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 [2021-12-07 00:26:46,377 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:26:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:26:46,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:46,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:46,400 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:46,405 INFO L85 PathProgramCache]: Analyzing trace with hash -814739894, now seen corresponding path program 1 times [2021-12-07 00:26:46,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:46,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908873587] [2021-12-07 00:26:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:46,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:46,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:46,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908873587] [2021-12-07 00:26:46,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908873587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:46,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:26:46,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:26:46,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601949735] [2021-12-07 00:26:46,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:46,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:26:46,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:26:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:26:46,568 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:46,579 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2021-12-07 00:26:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:26:46,581 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:26:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:46,590 INFO L225 Difference]: With dead ends: 52 [2021-12-07 00:26:46,590 INFO L226 Difference]: Without dead ends: 24 [2021-12-07 00:26:46,593 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 [2021-12-07 00:26:46,597 INFO L933 BasicCegarLoop]: 35 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, 35 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 [2021-12-07 00:26:46,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-07 00:26:46,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-07 00:26:46,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2021-12-07 00:26:46,630 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 12 [2021-12-07 00:26:46,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:46,631 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2021-12-07 00:26:46,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2021-12-07 00:26:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-07 00:26:46,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:46,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:46,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:26:46,633 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1144484620, now seen corresponding path program 1 times [2021-12-07 00:26:46,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937870191] [2021-12-07 00:26:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:46,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:46,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:46,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937870191] [2021-12-07 00:26:46,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937870191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:46,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:26:46,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:26:46,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192752132] [2021-12-07 00:26:46,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:46,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:26:46,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:26:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:26:46,709 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:46,745 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-12-07 00:26:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:26:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-07 00:26:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:46,746 INFO L225 Difference]: With dead ends: 62 [2021-12-07 00:26:46,746 INFO L226 Difference]: Without dead ends: 42 [2021-12-07 00:26:46,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:26:46,748 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:46,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 40 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-07 00:26:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 25. [2021-12-07 00:26:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-12-07 00:26:46,752 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2021-12-07 00:26:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:46,753 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-12-07 00:26:46,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-12-07 00:26:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-07 00:26:46,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:46,753 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:46,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:26:46,754 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1978272138, now seen corresponding path program 1 times [2021-12-07 00:26:46,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:46,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823527824] [2021-12-07 00:26:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:46,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:46,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:26:46,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:46,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823527824] [2021-12-07 00:26:46,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823527824] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:46,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113984152] [2021-12-07 00:26:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:46,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:46,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:46,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:46,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:26:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:26:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:46,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:26:46,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:26:46,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113984152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:46,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:26:46,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2021-12-07 00:26:46,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505160727] [2021-12-07 00:26:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:46,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:26:46,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:46,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:26:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:26:46,957 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:46,982 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-12-07 00:26:46,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:26:46,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-07 00:26:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:46,983 INFO L225 Difference]: With dead ends: 51 [2021-12-07 00:26:46,983 INFO L226 Difference]: Without dead ends: 47 [2021-12-07 00:26:46,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:26:46,984 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:46,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 120 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-07 00:26:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-12-07 00:26:46,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-12-07 00:26:46,989 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 16 [2021-12-07 00:26:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:46,990 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-12-07 00:26:46,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:46,990 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-12-07 00:26:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-07 00:26:46,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:46,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:47,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:26:47,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:47,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:47,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:47,195 INFO L85 PathProgramCache]: Analyzing trace with hash -35626147, now seen corresponding path program 1 times [2021-12-07 00:26:47,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854265873] [2021-12-07 00:26:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:47,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:26:47,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:47,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854265873] [2021-12-07 00:26:47,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854265873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:47,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105586661] [2021-12-07 00:26:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:47,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:47,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:47,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:47,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:26:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:47,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:26:47,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:26:47,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:26:47,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105586661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:26:47,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:26:47,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-07 00:26:47,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499875119] [2021-12-07 00:26:47,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:47,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:26:47,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:47,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:26:47,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:26:47,457 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:47,484 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2021-12-07 00:26:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:26:47,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-07 00:26:47,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:47,486 INFO L225 Difference]: With dead ends: 96 [2021-12-07 00:26:47,486 INFO L226 Difference]: Without dead ends: 68 [2021-12-07 00:26:47,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:26:47,488 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:47,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 60 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-07 00:26:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-12-07 00:26:47,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2021-12-07 00:26:47,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 22 [2021-12-07 00:26:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:47,496 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2021-12-07 00:26:47,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:47,497 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2021-12-07 00:26:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-07 00:26:47,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:47,498 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:47,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:26:47,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-07 00:26:47,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1865102999, now seen corresponding path program 1 times [2021-12-07 00:26:47,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:47,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399830153] [2021-12-07 00:26:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:47,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:26:47,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399830153] [2021-12-07 00:26:47,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399830153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204770999] [2021-12-07 00:26:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:47,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:47,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:47,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:47,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:26:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:47,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:26:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:48,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:26:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:26:48,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:48,166 INFO L354 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2021-12-07 00:26:48,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2021-12-07 00:26:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:26:48,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204770999] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:48,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:26:48,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 9] total 15 [2021-12-07 00:26:48,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386374913] [2021-12-07 00:26:48,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:26:48,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:26:48,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:48,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:26:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:26:48,190 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:48,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:48,287 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-12-07 00:26:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:26:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-07 00:26:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:48,288 INFO L225 Difference]: With dead ends: 60 [2021-12-07 00:26:48,288 INFO L226 Difference]: Without dead ends: 39 [2021-12-07 00:26:48,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:26:48,289 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:48,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 130 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:26:48,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-07 00:26:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-07 00:26:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-12-07 00:26:48,293 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 23 [2021-12-07 00:26:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:48,294 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-12-07 00:26:48,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-12-07 00:26:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-07 00:26:48,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:48,295 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:48,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:26:48,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:48,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:48,498 INFO L85 PathProgramCache]: Analyzing trace with hash 350629058, now seen corresponding path program 1 times [2021-12-07 00:26:48,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:48,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569050972] [2021-12-07 00:26:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:48,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:26:48,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:48,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569050972] [2021-12-07 00:26:48,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569050972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:48,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351930177] [2021-12-07 00:26:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:48,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:48,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:48,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:48,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:26:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:48,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-07 00:26:48,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:48,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-07 00:26:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:26:48,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:48,884 INFO L354 Elim1Store]: treesize reduction 38, result has 11.6 percent of original size [2021-12-07 00:26:48,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2021-12-07 00:26:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:26:48,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351930177] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:48,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:48,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2021-12-07 00:26:48,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590344847] [2021-12-07 00:26:48,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:48,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:26:48,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:48,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:26:48,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:26:48,911 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:49,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:49,109 INFO L93 Difference]: Finished difference Result 168 states and 224 transitions. [2021-12-07 00:26:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-07 00:26:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-07 00:26:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:49,110 INFO L225 Difference]: With dead ends: 168 [2021-12-07 00:26:49,110 INFO L226 Difference]: Without dead ends: 134 [2021-12-07 00:26:49,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:26:49,112 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 273 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:49,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 152 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:26:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-07 00:26:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 43. [2021-12-07 00:26:49,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2021-12-07 00:26:49,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 24 [2021-12-07 00:26:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:49,119 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2021-12-07 00:26:49,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2021-12-07 00:26:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-07 00:26:49,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:49,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:49,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:26:49,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:49,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1327832546, now seen corresponding path program 1 times [2021-12-07 00:26:49,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414930661] [2021-12-07 00:26:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:49,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:26:49,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414930661] [2021-12-07 00:26:49,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414930661] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:49,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019697022] [2021-12-07 00:26:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:49,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:49,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:49,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:26:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:26:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:26:49,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-07 00:26:49,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019697022] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:49,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:49,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 9 [2021-12-07 00:26:49,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076337409] [2021-12-07 00:26:49,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:49,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:26:49,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:26:49,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:26:49,499 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:49,826 INFO L93 Difference]: Finished difference Result 318 states and 471 transitions. [2021-12-07 00:26:49,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 00:26:49,827 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-07 00:26:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:49,828 INFO L225 Difference]: With dead ends: 318 [2021-12-07 00:26:49,828 INFO L226 Difference]: Without dead ends: 282 [2021-12-07 00:26:49,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:26:49,830 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 271 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:49,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 159 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:26:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-12-07 00:26:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 73. [2021-12-07 00:26:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2021-12-07 00:26:49,840 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 27 [2021-12-07 00:26:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:49,840 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2021-12-07 00:26:49,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2021-12-07 00:26:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:26:49,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:49,842 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:49,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:26:50,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:26:50,043 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:50,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1303869421, now seen corresponding path program 2 times [2021-12-07 00:26:50,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:50,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730849618] [2021-12-07 00:26:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:50,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:50,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:50,217 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 00:26:50,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730849618] [2021-12-07 00:26:50,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730849618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:50,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7140085] [2021-12-07 00:26:50,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:26:50,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:50,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:50,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:50,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:26:50,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:26:50,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:50,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-07 00:26:50,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:50,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:26:50,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 40 [2021-12-07 00:26:50,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-12-07 00:26:50,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-07 00:26:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 00:26:50,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 00:26:50,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7140085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:50,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:50,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 11] total 23 [2021-12-07 00:26:50,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980509855] [2021-12-07 00:26:50,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:50,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:26:50,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:50,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:26:50,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:26:50,910 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:51,765 INFO L93 Difference]: Finished difference Result 544 states and 715 transitions. [2021-12-07 00:26:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 00:26:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-07 00:26:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:51,769 INFO L225 Difference]: With dead ends: 544 [2021-12-07 00:26:51,769 INFO L226 Difference]: Without dead ends: 480 [2021-12-07 00:26:51,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:26:51,771 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 611 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:51,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 624 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:26:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-07 00:26:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 162. [2021-12-07 00:26:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2981366459627328) internal successors, (209), 161 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 209 transitions. [2021-12-07 00:26:51,791 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 209 transitions. Word has length 38 [2021-12-07 00:26:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:51,791 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 209 transitions. [2021-12-07 00:26:51,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:51,791 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 209 transitions. [2021-12-07 00:26:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 00:26:51,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:51,793 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:51,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-07 00:26:51,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:51,994 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:51,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:51,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1275455806, now seen corresponding path program 1 times [2021-12-07 00:26:51,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:51,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763510491] [2021-12-07 00:26:51,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:51,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:52,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 00:26:52,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763510491] [2021-12-07 00:26:52,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763510491] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:52,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825126717] [2021-12-07 00:26:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:52,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:52,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:52,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:52,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:26:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:52,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 00:26:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 00:26:52,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-07 00:26:52,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825126717] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:52,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:52,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 13 [2021-12-07 00:26:52,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804544146] [2021-12-07 00:26:52,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:52,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:26:52,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:52,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:26:52,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:26:52,301 INFO L87 Difference]: Start difference. First operand 162 states and 209 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:53,117 INFO L93 Difference]: Finished difference Result 882 states and 1255 transitions. [2021-12-07 00:26:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 00:26:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-07 00:26:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:53,121 INFO L225 Difference]: With dead ends: 882 [2021-12-07 00:26:53,121 INFO L226 Difference]: Without dead ends: 731 [2021-12-07 00:26:53,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=433, Invalid=1547, Unknown=0, NotChecked=0, Total=1980 [2021-12-07 00:26:53,124 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 873 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:53,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 534 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:26:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-07 00:26:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 248. [2021-12-07 00:26:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.3076923076923077) internal successors, (323), 247 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 323 transitions. [2021-12-07 00:26:53,159 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 323 transitions. Word has length 49 [2021-12-07 00:26:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:53,159 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 323 transitions. [2021-12-07 00:26:53,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 323 transitions. [2021-12-07 00:26:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-07 00:26:53,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:53,162 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:53,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:26:53,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:53,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1476472032, now seen corresponding path program 2 times [2021-12-07 00:26:53,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:53,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939298552] [2021-12-07 00:26:53,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:53,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-07 00:26:53,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939298552] [2021-12-07 00:26:53,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939298552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:53,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530466977] [2021-12-07 00:26:53,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:26:53,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:53,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:53,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:53,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:26:53,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:26:53,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-07 00:26:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 00:26:53,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-07 00:26:53,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530466977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:53,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:53,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2021-12-07 00:26:53,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595765511] [2021-12-07 00:26:53,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:53,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:26:53,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:26:53,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:26:53,785 INFO L87 Difference]: Start difference. First operand 248 states and 323 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:26:55,070 INFO L93 Difference]: Finished difference Result 1268 states and 1749 transitions. [2021-12-07 00:26:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-07 00:26:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-07 00:26:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:26:55,074 INFO L225 Difference]: With dead ends: 1268 [2021-12-07 00:26:55,074 INFO L226 Difference]: Without dead ends: 1033 [2021-12-07 00:26:55,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=633, Invalid=4197, Unknown=0, NotChecked=0, Total=4830 [2021-12-07 00:26:55,076 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 1129 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 2758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:26:55,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 2178 Invalid, 2758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 2411 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-07 00:26:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-12-07 00:26:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 310. [2021-12-07 00:26:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.3106796116504855) internal successors, (405), 309 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 405 transitions. [2021-12-07 00:26:55,102 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 405 transitions. Word has length 69 [2021-12-07 00:26:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:26:55,102 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 405 transitions. [2021-12-07 00:26:55,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:26:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 405 transitions. [2021-12-07 00:26:55,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-07 00:26:55,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:26:55,103 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:26:55,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:26:55,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:26:55,305 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:26:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:26:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1580316162, now seen corresponding path program 3 times [2021-12-07 00:26:55,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:26:55,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943850074] [2021-12-07 00:26:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:26:55,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:26:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:26:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-07 00:26:55,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:26:55,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943850074] [2021-12-07 00:26:55,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943850074] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:26:55,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214218820] [2021-12-07 00:26:55,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:26:55,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:26:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:26:55,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:26:55,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:26:55,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-07 00:26:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:26:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-07 00:26:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:26:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-07 00:26:55,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:26:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2021-12-07 00:26:56,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214218820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:26:56,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:26:56,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14] total 22 [2021-12-07 00:26:56,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043901178] [2021-12-07 00:26:56,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:26:56,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:26:56,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:26:56,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:26:56,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-12-07 00:26:56,076 INFO L87 Difference]: Start difference. First operand 310 states and 405 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:04,864 INFO L93 Difference]: Finished difference Result 2947 states and 3886 transitions. [2021-12-07 00:27:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-07 00:27:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-07 00:27:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:04,875 INFO L225 Difference]: With dead ends: 2947 [2021-12-07 00:27:04,875 INFO L226 Difference]: Without dead ends: 2652 [2021-12-07 00:27:04,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1485, Invalid=5655, Unknown=0, NotChecked=0, Total=7140 [2021-12-07 00:27:04,878 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 1569 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:04,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1569 Valid, 998 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-07 00:27:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-12-07 00:27:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 326. [2021-12-07 00:27:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.2984615384615386) internal successors, (422), 325 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:04,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 422 transitions. [2021-12-07 00:27:04,925 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 422 transitions. Word has length 83 [2021-12-07 00:27:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:04,925 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 422 transitions. [2021-12-07 00:27:04,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 422 transitions. [2021-12-07 00:27:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-07 00:27:04,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:04,927 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:04,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:27:05,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:05,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:05,130 INFO L85 PathProgramCache]: Analyzing trace with hash 20519926, now seen corresponding path program 4 times [2021-12-07 00:27:05,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:27:05,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234151068] [2021-12-07 00:27:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:05,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:27:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-07 00:27:05,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:27:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234151068] [2021-12-07 00:27:05,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234151068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:27:05,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869022381] [2021-12-07 00:27:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:27:05,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:05,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:27:05,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:27:05,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:27:05,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:27:05,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:27:05,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 00:27:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-07 00:27:05,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:27:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-07 00:27:05,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869022381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:27:05,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:27:05,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-07 00:27:05,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047469308] [2021-12-07 00:27:05,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:27:05,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:27:05,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:27:05,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:27:05,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:27:05,734 INFO L87 Difference]: Start difference. First operand 326 states and 422 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:27:05,922 INFO L93 Difference]: Finished difference Result 609 states and 809 transitions. [2021-12-07 00:27:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 00:27:05,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-07 00:27:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:27:05,925 INFO L225 Difference]: With dead ends: 609 [2021-12-07 00:27:05,925 INFO L226 Difference]: Without dead ends: 366 [2021-12-07 00:27:05,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-07 00:27:05,927 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 177 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:27:05,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 577 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:27:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-12-07 00:27:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 362. [2021-12-07 00:27:05,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 1.290858725761773) internal successors, (466), 361 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 466 transitions. [2021-12-07 00:27:05,972 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 466 transitions. Word has length 91 [2021-12-07 00:27:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:27:05,972 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 466 transitions. [2021-12-07 00:27:05,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:27:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 466 transitions. [2021-12-07 00:27:05,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:27:05,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:27:05,974 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:27:05,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:27:06,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:27:06,175 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:27:06,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:27:06,175 INFO L85 PathProgramCache]: Analyzing trace with hash 64411734, now seen corresponding path program 5 times [2021-12-07 00:27:06,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:27:06,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837310564] [2021-12-07 00:27:06,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:27:06,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:27:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:27:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 221 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-07 00:27:08,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:27:08,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837310564] [2021-12-07 00:27:08,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837310564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:27:08,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410149805] [2021-12-07 00:27:08,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:27:08,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:27:08,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:27:08,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:27:08,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:27:10,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 00:27:10,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:27:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-07 00:27:10,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:27:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:27:10,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:10,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:27:11,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 16 [2021-12-07 00:27:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 63 proven. 151 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-07 00:27:11,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:27:20,431 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) is different from false [2021-12-07 00:27:20,452 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) is different from false [2021-12-07 00:27:20,463 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) is different from false [2021-12-07 00:27:21,021 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ 2 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) is different from false [2021-12-07 00:27:24,442 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (<= 10 (mod (+ 6 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) is different from false [2021-12-07 00:27:24,687 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (<= 10 (mod (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) is different from false [2021-12-07 00:27:24,711 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ 7 |c_ULTIMATE.start_main_~i~0#1|) 4294967296)) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) is different from false [2021-12-07 00:27:24,724 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 8) 4294967296))) is different from false [2021-12-07 00:27:24,743 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_363 (Array Int Int)) (|ULTIMATE.start_main_~#string_entrada~0#1.offset| Int)) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_363) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse0 (select v_ArrVal_363 |ULTIMATE.start_main_~#string_entrada~0#1.offset|))) (or (< .cse0 (select .cse1 (+ 2 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))) (< (select .cse1 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|) .cse0)))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 8) 4294967296)) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) is different from false [2021-12-07 00:27:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 84 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 75 not checked. [2021-12-07 00:27:24,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410149805] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:27:24,939 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:27:24,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24, 32] total 83 [2021-12-07 00:27:24,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388307833] [2021-12-07 00:27:24,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:27:24,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-07 00:27:24,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:27:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-07 00:27:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=4778, Unknown=59, NotChecked=1368, Total=6806 [2021-12-07 00:27:24,942 INFO L87 Difference]: Start difference. First operand 362 states and 466 transitions. Second operand has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 83 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:16,115 INFO L93 Difference]: Finished difference Result 748 states and 969 transitions. [2021-12-07 00:28:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-07 00:28:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 83 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:28:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:16,118 INFO L225 Difference]: With dead ends: 748 [2021-12-07 00:28:16,118 INFO L226 Difference]: Without dead ends: 650 [2021-12-07 00:28:16,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 186 SyntacticMatches, 16 SemanticMatches, 148 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 5742 ImplicationChecksByTransitivity, 63.9s TimeCoverageRelationStatistics Valid=1914, Invalid=17766, Unknown=96, NotChecked=2574, Total=22350 [2021-12-07 00:28:16,124 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 509 mSDsluCounter, 1646 mSDsCounter, 0 mSdLazyCounter, 2222 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 4197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1897 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:16,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1694 Invalid, 4197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2222 Invalid, 0 Unknown, 1897 Unchecked, 1.5s Time] [2021-12-07 00:28:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-12-07 00:28:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 565. [2021-12-07 00:28:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.2819148936170213) internal successors, (723), 564 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 723 transitions. [2021-12-07 00:28:16,174 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 723 transitions. Word has length 97 [2021-12-07 00:28:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:16,174 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 723 transitions. [2021-12-07 00:28:16,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1566265060240966) internal successors, (179), 83 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 723 transitions. [2021-12-07 00:28:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:28:16,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:16,175 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:16,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-07 00:28:16,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:28:16,377 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:16,378 INFO L85 PathProgramCache]: Analyzing trace with hash 767102358, now seen corresponding path program 1 times [2021-12-07 00:28:16,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:16,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343398496] [2021-12-07 00:28:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:16,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-07 00:28:16,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:16,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343398496] [2021-12-07 00:28:16,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343398496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:28:16,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195565221] [2021-12-07 00:28:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:16,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:16,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:16,934 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:16,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:28:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:17,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:28:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:24,660 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-12-07 00:28:24,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-12-07 00:28:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-07 00:28:25,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:28:29,863 INFO L354 Elim1Store]: treesize reduction 145, result has 70.0 percent of original size [2021-12-07 00:28:29,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 437 [2021-12-07 00:28:34,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| already exists [2021-12-07 00:28:34,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:28:34,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 00:28:34,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088347213] [2021-12-07 00:28:34,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:28:34,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 00:28:34,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 00:28:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2158, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 00:28:34,708 INFO L87 Difference]: Start difference. First operand 565 states and 723 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:38,284 INFO L93 Difference]: Finished difference Result 7743 states and 10056 transitions. [2021-12-07 00:28:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-07 00:28:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:28:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:38,311 INFO L225 Difference]: With dead ends: 7743 [2021-12-07 00:28:38,311 INFO L226 Difference]: Without dead ends: 7725 [2021-12-07 00:28:38,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=418, Invalid=9682, Unknown=0, NotChecked=0, Total=10100 [2021-12-07 00:28:38,315 INFO L933 BasicCegarLoop]: 554 mSDtfsCounter, 709 mSDsluCounter, 9408 mSDsCounter, 0 mSdLazyCounter, 2078 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 9962 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:38,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 9962 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2078 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 00:28:38,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7725 states. [2021-12-07 00:28:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7725 to 2617. [2021-12-07 00:28:38,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2616 states have (on average 1.287079510703364) internal successors, (3367), 2616 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 3367 transitions. [2021-12-07 00:28:38,633 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 3367 transitions. Word has length 97 [2021-12-07 00:28:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:38,633 INFO L470 AbstractCegarLoop]: Abstraction has 2617 states and 3367 transitions. [2021-12-07 00:28:38,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 3367 transitions. [2021-12-07 00:28:38,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:28:38,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:38,637 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:38,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:28:38,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:38,838 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1025267796, now seen corresponding path program 2 times [2021-12-07 00:28:38,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:38,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335900460] [2021-12-07 00:28:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:38,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 16 proven. 77 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-12-07 00:28:39,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335900460] [2021-12-07 00:28:39,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335900460] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:28:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875922008] [2021-12-07 00:28:39,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:28:39,733 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:39,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:39,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:28:39,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:28:39,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:28:39,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:28:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:49,198 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-12-07 00:28:49,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-12-07 00:28:49,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Possible infinite loop detected |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| already exists [2021-12-07 00:28:49,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:28:49,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-07 00:28:49,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132065991] [2021-12-07 00:28:49,551 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:28:49,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-07 00:28:49,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:28:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-07 00:28:49,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-12-07 00:28:49,551 INFO L87 Difference]: Start difference. First operand 2617 states and 3367 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:28:50,823 INFO L93 Difference]: Finished difference Result 4868 states and 6299 transitions. [2021-12-07 00:28:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 00:28:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:28:50,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:28:50,834 INFO L225 Difference]: With dead ends: 4868 [2021-12-07 00:28:50,834 INFO L226 Difference]: Without dead ends: 2885 [2021-12-07 00:28:50,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 00:28:50,842 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 72 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:28:50,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 317 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-07 00:28:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2021-12-07 00:28:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2855. [2021-12-07 00:28:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2854 states have (on average 1.2817098808689558) internal successors, (3658), 2854 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 3658 transitions. [2021-12-07 00:28:51,162 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 3658 transitions. Word has length 97 [2021-12-07 00:28:51,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:28:51,162 INFO L470 AbstractCegarLoop]: Abstraction has 2855 states and 3658 transitions. [2021-12-07 00:28:51,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:28:51,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 3658 transitions. [2021-12-07 00:28:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:28:51,166 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:28:51,166 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:28:51,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-07 00:28:51,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:51,368 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:28:51,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:28:51,369 INFO L85 PathProgramCache]: Analyzing trace with hash 980530326, now seen corresponding path program 1 times [2021-12-07 00:28:51,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:28:51,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631821288] [2021-12-07 00:28:51,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:51,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:28:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:53,469 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-07 00:28:53,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:28:53,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631821288] [2021-12-07 00:28:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631821288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:28:53,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78690644] [2021-12-07 00:28:53,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:28:53,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:28:53,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:28:53,471 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:28:53,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:28:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:28:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:28:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:28:59,478 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-12-07 00:28:59,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 193 treesize of output 249 [2021-12-07 00:29:00,292 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-07 00:29:00,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:29:04,710 INFO L354 Elim1Store]: treesize reduction 145, result has 70.0 percent of original size [2021-12-07 00:29:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 437 [2021-12-07 00:30:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-12-07 00:30:55,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78690644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:30:55,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:30:55,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 16] total 53 [2021-12-07 00:30:55,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598424894] [2021-12-07 00:30:55,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:30:55,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-07 00:30:55,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:30:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-07 00:30:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2498, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 00:30:55,799 INFO L87 Difference]: Start difference. First operand 2855 states and 3658 transitions. Second operand has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:31:09,259 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 00:31:12,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:31:12,270 INFO L93 Difference]: Finished difference Result 7468 states and 9580 transitions. [2021-12-07 00:31:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-07 00:31:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:31:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:31:12,291 INFO L225 Difference]: With dead ends: 7468 [2021-12-07 00:31:12,291 INFO L226 Difference]: Without dead ends: 6250 [2021-12-07 00:31:12,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=855, Invalid=8265, Unknown=0, NotChecked=0, Total=9120 [2021-12-07 00:31:12,294 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 436 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 716 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:31:12,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 1058 Invalid, 1937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1114 Invalid, 0 Unknown, 716 Unchecked, 1.1s Time] [2021-12-07 00:31:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6250 states. [2021-12-07 00:31:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6250 to 4822. [2021-12-07 00:31:12,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 1.2686164696121136) internal successors, (6116), 4821 states have internal predecessors, (6116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:31:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 6116 transitions. [2021-12-07 00:31:12,907 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 6116 transitions. Word has length 97 [2021-12-07 00:31:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:31:12,907 INFO L470 AbstractCegarLoop]: Abstraction has 4822 states and 6116 transitions. [2021-12-07 00:31:12,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:31:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 6116 transitions. [2021-12-07 00:31:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:31:12,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:31:12,913 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:31:12,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:31:13,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:31:13,114 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:31:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:31:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 563531286, now seen corresponding path program 2 times [2021-12-07 00:31:13,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:31:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054061642] [2021-12-07 00:31:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:31:13,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:31:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:31:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 199 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-07 00:31:15,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:31:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054061642] [2021-12-07 00:31:15,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054061642] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:31:15,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404452591] [2021-12-07 00:31:15,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:31:15,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:31:15,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:31:15,809 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:31:15,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:31:15,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:31:15,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:31:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-07 00:31:15,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:31:19,389 INFO L354 Elim1Store]: treesize reduction 82, result has 65.1 percent of original size [2021-12-07 00:31:19,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 251 [2021-12-07 00:31:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 95 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-07 00:31:29,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:31:34,079 INFO L354 Elim1Store]: treesize reduction 147, result has 69.6 percent of original size [2021-12-07 00:31:34,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 224 treesize of output 435 [2021-12-07 00:32:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 104 proven. 19 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-12-07 00:32:42,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404452591] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:32:42,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:32:42,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 16] total 56 [2021-12-07 00:32:42,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976265521] [2021-12-07 00:32:42,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:32:42,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-07 00:32:42,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:32:42,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-07 00:32:42,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-12-07 00:32:42,319 INFO L87 Difference]: Start difference. First operand 4822 states and 6116 transitions. Second operand has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:32:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:32:55,818 INFO L93 Difference]: Finished difference Result 8991 states and 11536 transitions. [2021-12-07 00:32:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-07 00:32:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:32:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:32:55,844 INFO L225 Difference]: With dead ends: 8991 [2021-12-07 00:32:55,844 INFO L226 Difference]: Without dead ends: 7998 [2021-12-07 00:32:55,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4248 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=1203, Invalid=12839, Unknown=0, NotChecked=0, Total=14042 [2021-12-07 00:32:55,848 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 306 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1556 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 771 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-07 00:32:55,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 1349 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1556 Invalid, 0 Unknown, 771 Unchecked, 1.5s Time] [2021-12-07 00:32:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-12-07 00:32:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 6462. [2021-12-07 00:32:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6462 states, 6461 states have (on average 1.2753443739359231) internal successors, (8240), 6461 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:32:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8240 transitions. [2021-12-07 00:32:56,800 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8240 transitions. Word has length 97 [2021-12-07 00:32:56,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:32:56,800 INFO L470 AbstractCegarLoop]: Abstraction has 6462 states and 8240 transitions. [2021-12-07 00:32:56,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.642857142857143) internal successors, (148), 56 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:32:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8240 transitions. [2021-12-07 00:32:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:32:56,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:32:56,807 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:32:56,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:32:57,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:32:57,008 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:32:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:32:57,009 INFO L85 PathProgramCache]: Analyzing trace with hash 586163540, now seen corresponding path program 3 times [2021-12-07 00:32:57,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:32:57,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601993238] [2021-12-07 00:32:57,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:32:57,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:32:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:32:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 199 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-07 00:32:59,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:32:59,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601993238] [2021-12-07 00:32:59,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601993238] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:32:59,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638345588] [2021-12-07 00:32:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:32:59,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:32:59,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:32:59,448 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:32:59,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:32:59,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-07 00:32:59,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:32:59,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-07 00:32:59,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:00,047 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-07 00:33:00,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-12-07 00:33:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-12-07 00:33:00,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:00,477 INFO L354 Elim1Store]: treesize reduction 37, result has 75.5 percent of original size [2021-12-07 00:33:00,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 138 [2021-12-07 00:33:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-07 00:33:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638345588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:33:00,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:33:00,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 13, 9] total 44 [2021-12-07 00:33:00,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436522059] [2021-12-07 00:33:00,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:00,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 00:33:00,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:33:00,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 00:33:00,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 00:33:00,819 INFO L87 Difference]: Start difference. First operand 6462 states and 8240 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:33:14,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:14,938 INFO L93 Difference]: Finished difference Result 25480 states and 32936 transitions. [2021-12-07 00:33:14,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-12-07 00:33:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:33:14,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:14,965 INFO L225 Difference]: With dead ends: 25480 [2021-12-07 00:33:14,965 INFO L226 Difference]: Without dead ends: 22185 [2021-12-07 00:33:14,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11816 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4779, Invalid=30003, Unknown=0, NotChecked=0, Total=34782 [2021-12-07 00:33:14,973 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 1407 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:14,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 1036 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-07 00:33:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22185 states. [2021-12-07 00:33:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22185 to 11596. [2021-12-07 00:33:16,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11596 states, 11595 states have (on average 1.2702889176369125) internal successors, (14729), 11595 states have internal predecessors, (14729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:33:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11596 states to 11596 states and 14729 transitions. [2021-12-07 00:33:16,901 INFO L78 Accepts]: Start accepts. Automaton has 11596 states and 14729 transitions. Word has length 97 [2021-12-07 00:33:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:16,901 INFO L470 AbstractCegarLoop]: Abstraction has 11596 states and 14729 transitions. [2021-12-07 00:33:16,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 44 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:33:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 11596 states and 14729 transitions. [2021-12-07 00:33:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:33:16,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:16,913 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:16,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-07 00:33:17,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 00:33:17,115 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:33:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1862412630, now seen corresponding path program 4 times [2021-12-07 00:33:17,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:33:17,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183559062] [2021-12-07 00:33:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:17,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:33:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 52 proven. 26 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-07 00:33:17,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:33:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183559062] [2021-12-07 00:33:17,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183559062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211153882] [2021-12-07 00:33:17,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 00:33:17,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:33:17,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:33:17,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:33:17,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:33:18,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 00:33:18,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:33:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-07 00:33:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:33:18,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-07 00:33:18,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:18,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2021-12-07 00:33:19,193 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-12-07 00:33:19,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 48 [2021-12-07 00:33:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 45 proven. 62 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-12-07 00:33:19,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:33:22,998 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_700 (Array Int Int)) (|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int)) (let ((.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|)) (.cse1 (select v_ArrVal_700 (+ |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) (- 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|))) (or (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< (select .cse0 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1)) .cse1) (<= .cse2 2147483647) (<= 4294967296 .cse2) (< .cse1 (select .cse0 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))))) (forall ((v_ArrVal_700 (Array Int Int)) (|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int)) (let ((.cse4 (select v_ArrVal_700 (+ |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296)))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1)) .cse4) (< .cse5 0) (< .cse4 (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|)) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< 2147483647 .cse5) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))))) is different from false [2021-12-07 00:33:24,317 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_700 (Array Int Int)) (|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int)) (let ((.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|)) (.cse1 (select v_ArrVal_700 (+ |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) (- 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|))) (or (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< (select .cse0 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1)) .cse1) (<= .cse2 2147483647) (<= 4294967296 .cse2) (< .cse1 (select .cse0 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))))) (forall ((v_ArrVal_700 (Array Int Int)) (|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int)) (let ((.cse4 (select v_ArrVal_700 (+ |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296)))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1)) .cse4) (< .cse5 0) (< .cse4 (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|)) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< 2147483647 .cse5) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))))) (<= 10 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296))) is different from false [2021-12-07 00:33:24,411 WARN L838 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_700 (Array Int Int)) (|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int)) (let ((.cse2 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|)) (.cse1 (select v_ArrVal_700 (+ |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296) (- 4294967296)))) (.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|))) (or (<= |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 2147483647) (<= 4294967296 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) (< (select .cse0 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1)) .cse1) (<= .cse2 2147483647) (<= 4294967296 .cse2) (< .cse1 (select .cse0 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|))))) (forall ((v_ArrVal_700 (Array Int Int)) (|aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int) (|aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| Int)) (let ((.cse4 (select v_ArrVal_700 (+ |c_ULTIMATE.start_main_~#string_entrada~0#1.offset| (mod |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 4294967296)))) (.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#string_entrada~0#1.base| v_ArrVal_700) |c_ULTIMATE.start_main_~#vetor_vogais~0#1.base|)) (.cse5 (+ (* 4294967296 |aux_div_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|) |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))) (or (< (select .cse3 (+ |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 1)) .cse4) (< .cse5 0) (< .cse4 (select .cse3 |c_ULTIMATE.start_main_~#vetor_vogais~0#1.offset|)) (< |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56| 0) (< 2147483647 .cse5) (< 2147483647 |aux_mod_aux_mod_ULTIMATE.start_main_~i~0#1_45_56|))))) (<= 10 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296))) is different from false [2021-12-07 00:33:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 74 proven. 5 refuted. 0 times theorem prover too weak. 235 trivial. 28 not checked. [2021-12-07 00:33:24,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211153882] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:33:24,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:33:24,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 16] total 38 [2021-12-07 00:33:24,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628722503] [2021-12-07 00:33:24,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:33:24,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-07 00:33:24,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:33:24,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-07 00:33:24,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1025, Unknown=3, NotChecked=204, Total=1406 [2021-12-07 00:33:24,531 INFO L87 Difference]: Start difference. First operand 11596 states and 14729 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:33:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:33:30,652 INFO L93 Difference]: Finished difference Result 21114 states and 26913 transitions. [2021-12-07 00:33:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-07 00:33:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-07 00:33:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:33:30,685 INFO L225 Difference]: With dead ends: 21114 [2021-12-07 00:33:30,685 INFO L226 Difference]: Without dead ends: 13456 [2021-12-07 00:33:30,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=589, Invalid=3976, Unknown=3, NotChecked=402, Total=4970 [2021-12-07 00:33:30,692 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 280 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 503 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-07 00:33:30,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 394 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 503 Invalid, 0 Unknown, 503 Unchecked, 0.6s Time] [2021-12-07 00:33:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13456 states. [2021-12-07 00:33:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13456 to 13349. [2021-12-07 00:33:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13349 states, 13348 states have (on average 1.2634851663170512) internal successors, (16865), 13348 states have internal predecessors, (16865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:33:33,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13349 states to 13349 states and 16865 transitions. [2021-12-07 00:33:33,175 INFO L78 Accepts]: Start accepts. Automaton has 13349 states and 16865 transitions. Word has length 97 [2021-12-07 00:33:33,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:33:33,175 INFO L470 AbstractCegarLoop]: Abstraction has 13349 states and 16865 transitions. [2021-12-07 00:33:33,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:33:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 13349 states and 16865 transitions. [2021-12-07 00:33:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-07 00:33:33,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:33:33,190 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:33:33,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-07 00:33:33,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:33:33,391 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:33:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:33:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1628922218, now seen corresponding path program 5 times [2021-12-07 00:33:33,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:33:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624063259] [2021-12-07 00:33:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:33:33,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:33:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:33:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 46 proven. 40 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-12-07 00:33:34,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:33:34,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624063259] [2021-12-07 00:33:34,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624063259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:33:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413380393] [2021-12-07 00:33:34,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 00:33:34,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:33:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:33:34,227 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:33:34,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ab117a5-02c2-4e94-9df9-e657f7bc57de/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 00:34:11,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-07 00:34:11,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:34:11,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-07 00:34:11,671 INFO L286 TraceCheckSpWp]: Computing forward predicates...