./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL --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 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:32:41,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:32:41,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:32:41,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:32:41,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:32:41,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:32:41,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:32:41,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:32:41,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:32:41,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:32:41,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:32:41,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:32:41,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:32:41,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:32:41,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:32:41,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:32:41,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:32:41,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:32:41,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:32:41,226 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:32:41,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:32:41,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:32:41,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:32:41,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:32:41,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:32:41,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:32:41,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:32:41,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:32:41,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:32:41,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:32:41,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:32:41,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:32:41,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:32:41,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:32:41,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:32:41,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:32:41,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:32:41,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:32:41,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:32:41,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:32:41,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:32:41,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 05:32:41,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:32:41,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:32:41,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:32:41,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:32:41,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:32:41,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:32:41,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:32:41,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:32:41,323 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:32:41,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:32:41,324 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:32:41,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:32:41,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:32:41,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:32:41,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:32:41,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:32:41,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:32:41,326 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:32:41,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:32:41,326 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:32:41,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:32:41,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:32:41,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:32:41,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:32:41,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:32:41,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:32:41,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:32:41,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:32:41,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:32:41,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:32:41,339 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 05:32:41,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 05:32:41,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:32:41,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:32:41,340 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_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 455c8355a70d1790a36f88862e376be10c9f4a7e771f908daaa372028f23f8c4 [2021-11-19 05:32:41,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:32:41,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:32:41,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:32:41,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:32:41,768 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:32:41,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2021-11-19 05:32:41,846 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/data/189bd7bd7/7700ca2cbf674a028f775229da079fee/FLAG2914c534f [2021-11-19 05:32:42,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:32:42,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i [2021-11-19 05:32:42,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/data/189bd7bd7/7700ca2cbf674a028f775229da079fee/FLAG2914c534f [2021-11-19 05:32:42,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/data/189bd7bd7/7700ca2cbf674a028f775229da079fee [2021-11-19 05:32:42,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:32:42,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:32:42,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:32:42,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:32:42,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:32:42,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:32:42" (1/1) ... [2021-11-19 05:32:42,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdb54cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:42, skipping insertion in model container [2021-11-19 05:32:42,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:32:42" (1/1) ... [2021-11-19 05:32:42,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:32:42,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:32:42,951 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_6d455f13-f2af-4e5f-8b18-9440974b7573/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2021-11-19 05:32:42,968 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:32:42,977 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:32:42,992 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_6d455f13-f2af-4e5f-8b18-9440974b7573/sv-benchmarks/c/loop-crafted/simple_array_index_value_1-1.i[834,847] [2021-11-19 05:32:42,999 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:32:43,015 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:32:43,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43 WrapperNode [2021-11-19 05:32:43,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:32:43,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:32:43,017 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:32:43,017 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:32:43,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,055 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-19 05:32:43,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:32:43,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:32:43,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:32:43,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:32:43,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,082 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:32:43,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:32:43,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:32:43,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:32:43,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (1/1) ... [2021-11-19 05:32:43,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:32:43,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:43,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:32:43,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:32:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:32:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:32:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:32:43,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:32:43,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:32:43,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:32:43,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:32:43,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 05:32:43,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 05:32:43,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:32:43,262 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:32:43,264 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:32:43,463 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:32:43,470 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:32:43,470 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-19 05:32:43,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:32:43 BoogieIcfgContainer [2021-11-19 05:32:43,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:32:43,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:32:43,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:32:43,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:32:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:32:42" (1/3) ... [2021-11-19 05:32:43,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f969a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:32:43, skipping insertion in model container [2021-11-19 05:32:43,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:32:43" (2/3) ... [2021-11-19 05:32:43,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f969a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:32:43, skipping insertion in model container [2021-11-19 05:32:43,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:32:43" (3/3) ... [2021-11-19 05:32:43,483 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2021-11-19 05:32:43,489 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:32:43,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 05:32:43,583 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:32:43,591 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:32:43,592 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 05:32:43,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:32:43,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 05:32:43,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:43,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:43,616 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:43,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1969531013, now seen corresponding path program 1 times [2021-11-19 05:32:43,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:43,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303051557] [2021-11-19 05:32:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:43,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:43,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:43,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303051557] [2021-11-19 05:32:43,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303051557] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:32:43,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:32:43,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:32:43,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586530614] [2021-11-19 05:32:43,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:32:43,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 05:32:43,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 05:32:43,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 05:32:43,862 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:32:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:32:43,956 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2021-11-19 05:32:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 05:32:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 05:32:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:32:43,968 INFO L225 Difference]: With dead ends: 47 [2021-11-19 05:32:43,968 INFO L226 Difference]: Without dead ends: 25 [2021-11-19 05:32:43,973 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 [2021-11-19 05:32:43,978 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:32:43,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 36 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:32:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-19 05:32:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-19 05:32:44,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:32:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-19 05:32:44,043 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2021-11-19 05:32:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:32:44,044 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-19 05:32:44,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:32:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-19 05:32:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-19 05:32:44,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:44,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:44,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:32:44,052 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:44,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:44,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1314333447, now seen corresponding path program 1 times [2021-11-19 05:32:44,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:44,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009580696] [2021-11-19 05:32:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:44,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:44,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:44,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009580696] [2021-11-19 05:32:44,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009580696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:32:44,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767692595] [2021-11-19 05:32:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:44,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:44,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:44,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:32:44,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:32:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:44,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:32:44,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:32:44,409 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 11 treesize of output 7 [2021-11-19 05:32:44,539 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 [2021-11-19 05:32:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:44,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:32:45,169 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 43 treesize of output 39 [2021-11-19 05:32:45,178 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 56 treesize of output 52 [2021-11-19 05:32:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:45,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767692595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:32:45,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:32:45,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 9] total 14 [2021-11-19 05:32:45,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834591880] [2021-11-19 05:32:45,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:32:45,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 05:32:45,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:45,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 05:32:45,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:32:45,264 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:32:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:32:45,678 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-11-19 05:32:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 05:32:45,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-19 05:32:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:32:45,680 INFO L225 Difference]: With dead ends: 53 [2021-11-19 05:32:45,680 INFO L226 Difference]: Without dead ends: 37 [2021-11-19 05:32:45,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:32:45,682 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:32:45,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 90 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:32:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-19 05:32:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-11-19 05:32:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:32:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-19 05:32:45,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 12 [2021-11-19 05:32:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:32:45,693 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-19 05:32:45,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:32:45,694 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-19 05:32:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:32:45,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:45,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:45,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:32:45,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:45,918 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1546622032, now seen corresponding path program 1 times [2021-11-19 05:32:45,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:45,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92326004] [2021-11-19 05:32:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:45,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:46,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-11-19 05:32:46,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:32:46,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:46,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92326004] [2021-11-19 05:32:46,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92326004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:32:46,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243059307] [2021-11-19 05:32:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:46,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:46,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:32:46,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:32:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 05:32:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:32:46,124 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 40 treesize of output 36 [2021-11-19 05:32:47,860 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-19 05:32:47,861 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 67 treesize of output 50 [2021-11-19 05:32:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:48,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:32:48,466 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 25 treesize of output 23 [2021-11-19 05:32:48,470 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 48 treesize of output 44 [2021-11-19 05:32:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:48,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243059307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:32:48,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:32:48,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 19 [2021-11-19 05:32:48,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497749762] [2021-11-19 05:32:48,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:32:48,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 05:32:48,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 05:32:48,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:32:48,594 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:32:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:32:50,285 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2021-11-19 05:32:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 05:32:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2021-11-19 05:32:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:32:50,288 INFO L225 Difference]: With dead ends: 99 [2021-11-19 05:32:50,288 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 05:32:50,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:32:50,292 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:32:50,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 180 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 215 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2021-11-19 05:32:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 05:32:50,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 42. [2021-11-19 05:32:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 05:32:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-19 05:32:50,306 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2021-11-19 05:32:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:32:50,306 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-19 05:32:50,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:32:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-19 05:32:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 05:32:50,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:50,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:50,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:32:50,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:50,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2127315698, now seen corresponding path program 2 times [2021-11-19 05:32:50,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:50,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580525267] [2021-11-19 05:32:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:50,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:50,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:50,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-19 05:32:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 05:32:50,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:50,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580525267] [2021-11-19 05:32:50,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580525267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:32:50,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120390509] [2021-11-19 05:32:50,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:32:50,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:50,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:50,686 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:32:50,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:32:50,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:32:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:32:50,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 05:32:50,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:32:50,768 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 19 treesize of output 15 [2021-11-19 05:32:50,886 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-19 05:32:50,886 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 1 case distinctions, treesize of input 86 treesize of output 85 [2021-11-19 05:32:54,836 INFO L354 Elim1Store]: treesize reduction 86, result has 3.4 percent of original size [2021-11-19 05:32:54,839 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 126 treesize of output 85 [2021-11-19 05:32:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:55,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:32:55,657 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 40 treesize of output 38 [2021-11-19 05:32:55,662 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 132 treesize of output 128 [2021-11-19 05:32:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:32:55,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120390509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:32:55,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:32:55,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 24 [2021-11-19 05:32:55,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067019031] [2021-11-19 05:32:55,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:32:55,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 05:32:55,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:32:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 05:32:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:32:55,880 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:32:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:32:57,680 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2021-11-19 05:32:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 05:32:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-19 05:32:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:32:57,683 INFO L225 Difference]: With dead ends: 104 [2021-11-19 05:32:57,683 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 05:32:57,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2021-11-19 05:32:57,686 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 92 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:32:57,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 187 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 257 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2021-11-19 05:32:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 05:32:57,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2021-11-19 05:32:57,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 53 states have internal predecessors, (57), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 05:32:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2021-11-19 05:32:57,700 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 25 [2021-11-19 05:32:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:32:57,701 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2021-11-19 05:32:57,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 5 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:32:57,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2021-11-19 05:32:57,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-19 05:32:57,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:32:57,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:32:57,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:32:57,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:57,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:32:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:32:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash 979241, now seen corresponding path program 1 times [2021-11-19 05:32:57,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:32:57,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184731963] [2021-11-19 05:32:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:57,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:32:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:58,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:32:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:58,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-19 05:32:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:32:58,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:32:58,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184731963] [2021-11-19 05:32:58,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184731963] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:32:58,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884365864] [2021-11-19 05:32:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:32:58,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:32:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:32:58,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:32:58,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:32:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:32:58,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 05:32:58,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:32:58,143 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 19 treesize of output 15 [2021-11-19 05:32:58,192 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-19 05:32:58,193 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 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-19 05:32:58,258 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-11-19 05:32:58,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-11-19 05:32:58,350 INFO L354 Elim1Store]: treesize reduction 104, result has 20.0 percent of original size [2021-11-19 05:32:58,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 44 [2021-11-19 05:32:59,108 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-19 05:32:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-11-19 05:32:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:32:59,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:03,821 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 200 treesize of output 194 [2021-11-19 05:33:03,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 05:33:03,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2716 treesize of output 2696 [2021-11-19 05:33:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:33:05,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884365864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:05,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:05,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 20, 22] total 42 [2021-11-19 05:33:05,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310780372] [2021-11-19 05:33:05,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:05,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-19 05:33:05,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-19 05:33:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1422, Unknown=0, NotChecked=0, Total=1722 [2021-11-19 05:33:05,115 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 42 states, 38 states have (on average 2.0) internal successors, (76), 41 states have internal predecessors, (76), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:33:07,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:07,758 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2021-11-19 05:33:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:33:07,759 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 2.0) internal successors, (76), 41 states have internal predecessors, (76), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 36 [2021-11-19 05:33:07,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:07,761 INFO L225 Difference]: With dead ends: 128 [2021-11-19 05:33:07,761 INFO L226 Difference]: Without dead ends: 75 [2021-11-19 05:33:07,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=487, Invalid=2269, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 05:33:07,764 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 57 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:07,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 300 Invalid, 0 Unknown, 66 Unchecked, 1.0s Time] [2021-11-19 05:33:07,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-19 05:33:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2021-11-19 05:33:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 05:33:07,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-11-19 05:33:07,777 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 36 [2021-11-19 05:33:07,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:07,777 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-11-19 05:33:07,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 2.0) internal successors, (76), 41 states have internal predecessors, (76), 7 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-19 05:33:07,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-11-19 05:33:07,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 05:33:07,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:07,780 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:07,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-19 05:33:08,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:08,005 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1059460180, now seen corresponding path program 2 times [2021-11-19 05:33:08,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:08,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250081614] [2021-11-19 05:33:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:08,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:08,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-11-19 05:33:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:08,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-11-19 05:33:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:08,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 05:33:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 05:33:08,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:08,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250081614] [2021-11-19 05:33:08,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250081614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:08,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129718993] [2021-11-19 05:33:08,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:33:08,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:08,154 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:08,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:33:08,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:33:08,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:33:08,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 05:33:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 05:33:08,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-19 05:33:08,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129718993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:08,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:08,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 10 [2021-11-19 05:33:08,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497740161] [2021-11-19 05:33:08,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:08,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:33:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:33:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:33:08,471 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 05:33:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:08,636 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2021-11-19 05:33:08,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:33:08,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 47 [2021-11-19 05:33:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:08,638 INFO L225 Difference]: With dead ends: 127 [2021-11-19 05:33:08,638 INFO L226 Difference]: Without dead ends: 76 [2021-11-19 05:33:08,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:33:08,640 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:08,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 81 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:33:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-19 05:33:08,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2021-11-19 05:33:08,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 05:33:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-19 05:33:08,655 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2021-11-19 05:33:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:08,655 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-19 05:33:08,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-19 05:33:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-19 05:33:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 05:33:08,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:08,657 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:08,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:08,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:08,878 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:08,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:08,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1040678612, now seen corresponding path program 3 times [2021-11-19 05:33:08,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:08,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526718537] [2021-11-19 05:33:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:08,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:09,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-19 05:33:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:09,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-19 05:33:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:09,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-19 05:33:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:33:09,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:09,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526718537] [2021-11-19 05:33:09,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526718537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:09,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127647790] [2021-11-19 05:33:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:33:09,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:09,098 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:09,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:33:09,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 05:33:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:33:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 05:33:09,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 05:33:09,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:33:10,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127647790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:10,364 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:10,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 15] total 23 [2021-11-19 05:33:10,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572361537] [2021-11-19 05:33:10,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:10,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 05:33:10,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 05:33:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:33:10,367 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:33:15,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:15,306 INFO L93 Difference]: Finished difference Result 159 states and 181 transitions. [2021-11-19 05:33:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:33:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-11-19 05:33:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:15,308 INFO L225 Difference]: With dead ends: 159 [2021-11-19 05:33:15,308 INFO L226 Difference]: Without dead ends: 119 [2021-11-19 05:33:15,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:33:15,310 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:15,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 206 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 05:33:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-19 05:33:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 71. [2021-11-19 05:33:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 05:33:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-19 05:33:15,326 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 49 [2021-11-19 05:33:15,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:15,327 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-19 05:33:15,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-19 05:33:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-19 05:33:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 05:33:15,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:15,329 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:15,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:15,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:15,532 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:15,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1127306980, now seen corresponding path program 4 times [2021-11-19 05:33:15,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:15,533 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096543338] [2021-11-19 05:33:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:15,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:15,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-19 05:33:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-19 05:33:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-19 05:33:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 6 proven. 196 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:33:15,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:15,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096543338] [2021-11-19 05:33:15,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096543338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:15,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712898548] [2021-11-19 05:33:15,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:33:15,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:15,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:15,848 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:15,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:33:17,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:33:17,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:33:17,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-19 05:33:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:33:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 05:33:17,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:33:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 6 proven. 196 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:33:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712898548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:33:18,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:33:18,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2021-11-19 05:33:18,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940689433] [2021-11-19 05:33:18,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:33:18,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 05:33:18,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:33:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 05:33:18,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=738, Unknown=0, NotChecked=0, Total=1056 [2021-11-19 05:33:18,259 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:33:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:33:34,780 INFO L93 Difference]: Finished difference Result 272 states and 318 transitions. [2021-11-19 05:33:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:33:34,781 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2021-11-19 05:33:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:33:34,784 INFO L225 Difference]: With dead ends: 272 [2021-11-19 05:33:34,784 INFO L226 Difference]: Without dead ends: 232 [2021-11-19 05:33:34,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=780, Invalid=1382, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 05:33:34,786 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 774 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:33:34,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 644 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 1594 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-19 05:33:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-19 05:33:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 103. [2021-11-19 05:33:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 05:33:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2021-11-19 05:33:34,817 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 65 [2021-11-19 05:33:34,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:33:34,818 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2021-11-19 05:33:34,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 05:33:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2021-11-19 05:33:34,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-19 05:33:34,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:33:34,821 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:33:34,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:33:35,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:35,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 05:33:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:33:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash -965650180, now seen corresponding path program 5 times [2021-11-19 05:33:35,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:33:35,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084486748] [2021-11-19 05:33:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:33:35,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:33:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:35,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-19 05:33:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:35,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-19 05:33:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:35,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-19 05:33:35,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:33:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 6 proven. 900 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 05:33:35,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:33:35,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084486748] [2021-11-19 05:33:35,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084486748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:33:35,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773522250] [2021-11-19 05:33:35,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:33:35,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:33:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:33:35,907 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:33:35,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d455f13-f2af-4e5f-8b18-9440974b7573/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process