./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array9_pattern.c --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_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/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_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array9_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/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_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/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 8ae6792b63619c19d32145c9c656ded5ce2ab653945337eaf95cf4eb94965d3b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:22:35,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:22:35,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:22:35,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:22:35,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:22:35,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:22:35,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:22:35,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:22:35,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:22:35,241 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:22:35,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:22:35,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:22:35,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:22:35,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:22:35,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:22:35,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:22:35,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:22:35,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:22:35,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:22:35,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:22:35,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:22:35,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:22:35,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:22:35,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:22:35,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:22:35,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:22:35,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:22:35,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:22:35,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:22:35,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:22:35,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:22:35,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:22:35,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:22:35,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:22:35,329 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:22:35,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:22:35,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:22:35,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:22:35,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:22:35,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:22:35,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:22:35,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:22:35,396 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:22:35,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:22:35,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:22:35,397 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:22:35,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:22:35,398 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:22:35,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:22:35,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:22:35,399 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:22:35,400 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:22:35,400 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:22:35,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:22:35,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:22:35,401 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:22:35,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:22:35,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:22:35,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:22:35,402 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:22:35,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:22:35,402 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:22:35,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:22:35,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:22:35,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:22:35,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:22:35,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:22:35,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:22:35,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:22:35,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:22:35,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:22:35,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:22:35,405 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:22:35,405 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:22:35,405 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:22:35,405 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:22:35,406 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_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ae6792b63619c19d32145c9c656ded5ce2ab653945337eaf95cf4eb94965d3b [2021-11-19 04:22:35,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:22:35,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:22:35,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:22:35,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:22:35,676 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:22:35,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-patterns/array9_pattern.c [2021-11-19 04:22:35,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/data/3316dd471/8962f1047d7f4f67a143d2f9664440ef/FLAG81ad701a1 [2021-11-19 04:22:36,230 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:22:36,231 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/sv-benchmarks/c/array-patterns/array9_pattern.c [2021-11-19 04:22:36,251 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/data/3316dd471/8962f1047d7f4f67a143d2f9664440ef/FLAG81ad701a1 [2021-11-19 04:22:36,569 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/data/3316dd471/8962f1047d7f4f67a143d2f9664440ef [2021-11-19 04:22:36,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:22:36,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:22:36,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:22:36,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:22:36,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:22:36,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3537d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36, skipping insertion in model container [2021-11-19 04:22:36,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:22:36,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:22:36,764 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_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/sv-benchmarks/c/array-patterns/array9_pattern.c[1352,1365] [2021-11-19 04:22:36,785 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:22:36,794 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:22:36,809 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_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/sv-benchmarks/c/array-patterns/array9_pattern.c[1352,1365] [2021-11-19 04:22:36,821 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:22:36,836 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:22:36,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36 WrapperNode [2021-11-19 04:22:36,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:22:36,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:22:36,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:22:36,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:22:36,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,876 INFO L137 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2021-11-19 04:22:36,877 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:22:36,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:22:36,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:22:36,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:22:36,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:22:36,903 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:22:36,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:22:36,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:22:36,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (1/1) ... [2021-11-19 04:22:36,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:22:36,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:36,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:22:36,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:22:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:22:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:22:36,995 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:22:36,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:22:36,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:22:36,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:22:36,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:22:36,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:22:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:22:36,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:22:37,061 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:22:37,062 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:22:37,262 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:22:37,269 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:22:37,269 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-19 04:22:37,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:22:37 BoogieIcfgContainer [2021-11-19 04:22:37,271 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:22:37,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:22:37,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:22:37,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:22:37,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:22:36" (1/3) ... [2021-11-19 04:22:37,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65546174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:22:37, skipping insertion in model container [2021-11-19 04:22:37,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:22:36" (2/3) ... [2021-11-19 04:22:37,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65546174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:22:37, skipping insertion in model container [2021-11-19 04:22:37,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:22:37" (3/3) ... [2021-11-19 04:22:37,280 INFO L111 eAbstractionObserver]: Analyzing ICFG array9_pattern.c [2021-11-19 04:22:37,286 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:22:37,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:22:37,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:22:37,354 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 04:22:37,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:22:37,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 04:22:37,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-19 04:22:37,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:37,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:37,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:37,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2021-11-19 04:22:37,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:37,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876394427] [2021-11-19 04:22:37,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:37,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:22:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:37,583 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 04:22:37,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:37,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876394427] [2021-11-19 04:22:37,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876394427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:22:37,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:22:37,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:22:37,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707550907] [2021-11-19 04:22:37,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:22:37,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:22:37,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:22:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:22:37,628 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:22:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:37,648 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-11-19 04:22:37,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:22:37,651 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-19 04:22:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:37,658 INFO L225 Difference]: With dead ends: 53 [2021-11-19 04:22:37,658 INFO L226 Difference]: Without dead ends: 24 [2021-11-19 04:22:37,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:22:37,666 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:37,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:22:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-19 04:22:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-19 04:22:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 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 04:22:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-19 04:22:37,754 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-11-19 04:22:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:37,755 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-19 04:22:37,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:22:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-19 04:22:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 04:22:37,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:37,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:37,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:22:37,763 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:37,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2021-11-19 04:22:37,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:37,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799128135] [2021-11-19 04:22:37,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:37,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:37,835 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:22:37,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227349164] [2021-11-19 04:22:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:37,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:37,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:37,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:22:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:37,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:22:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:38,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:22:38,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:38,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799128135] [2021-11-19 04:22:38,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:22:38,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227349164] [2021-11-19 04:22:38,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227349164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:22:38,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:22:38,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:22:38,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994543908] [2021-11-19 04:22:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:22:38,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:22:38,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:22:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:22:38,169 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:22:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:38,336 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-11-19 04:22:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:22:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-19 04:22:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:38,340 INFO L225 Difference]: With dead ends: 50 [2021-11-19 04:22:38,340 INFO L226 Difference]: Without dead ends: 32 [2021-11-19 04:22:38,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:22:38,346 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:38,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:22:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-19 04:22:38,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-11-19 04:22:38,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:22:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-11-19 04:22:38,360 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2021-11-19 04:22:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:38,361 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-11-19 04:22:38,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:22:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-11-19 04:22:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:22:38,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:38,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:38,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:38,591 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2021-11-19 04:22:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:38,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448114830] [2021-11-19 04:22:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:38,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:38,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:22:38,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930594713] [2021-11-19 04:22:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:38,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:38,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:38,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:38,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:22:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:22:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 04:22:38,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:38,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:22:38,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:22:39,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:22:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2021-11-19 04:22:41,118 INFO L354 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2021-11-19 04:22:41,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 41 [2021-11-19 04:22:41,377 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-11-19 04:22:41,378 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 42 treesize of output 28 [2021-11-19 04:22:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:41,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:44,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:44,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448114830] [2021-11-19 04:22:44,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:22:44,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930594713] [2021-11-19 04:22:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930594713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:44,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:22:44,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-19 04:22:44,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920039111] [2021-11-19 04:22:44,774 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:44,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:22:44,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:22:44,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=416, Unknown=4, NotChecked=0, Total=506 [2021-11-19 04:22:44,777 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:22:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:44,912 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-11-19 04:22:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:22:44,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-19 04:22:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:44,914 INFO L225 Difference]: With dead ends: 71 [2021-11-19 04:22:44,914 INFO L226 Difference]: Without dead ends: 51 [2021-11-19 04:22:44,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=91, Invalid=457, Unknown=4, NotChecked=0, Total=552 [2021-11-19 04:22:44,916 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:44,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 161 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 58 Unchecked, 0.1s Time] [2021-11-19 04:22:44,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-19 04:22:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-11-19 04:22:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:22:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-19 04:22:44,928 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 29 [2021-11-19 04:22:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:44,929 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-19 04:22:44,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:22:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-19 04:22:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:22:44,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:44,931 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:44,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:45,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-19 04:22:45,147 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2021-11-19 04:22:45,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:45,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175781559] [2021-11-19 04:22:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:45,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:45,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:22:45,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1682259835] [2021-11-19 04:22:45,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:22:45,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:45,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:45,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:45,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:22:45,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:22:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:45,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:22:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:45,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:22:45,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:45,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175781559] [2021-11-19 04:22:45,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:22:45,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682259835] [2021-11-19 04:22:45,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682259835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:45,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:22:45,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 04:22:45,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077544621] [2021-11-19 04:22:45,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:45,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:22:45,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:45,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:22:45,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:22:45,504 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:22:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:45,641 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-19 04:22:45,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:22:45,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-19 04:22:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:45,644 INFO L225 Difference]: With dead ends: 79 [2021-11-19 04:22:45,644 INFO L226 Difference]: Without dead ends: 69 [2021-11-19 04:22:45,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:22:45,646 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:45,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 104 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:22:45,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-19 04:22:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2021-11-19 04:22:45,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:22:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-11-19 04:22:45,658 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 31 [2021-11-19 04:22:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:45,659 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-11-19 04:22:45,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:22:45,659 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-11-19 04:22:45,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 04:22:45,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:45,661 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:45,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:45,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:45,883 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1857874167, now seen corresponding path program 3 times [2021-11-19 04:22:45,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:45,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999694700] [2021-11-19 04:22:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:45,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:45,915 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:22:45,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732923356] [2021-11-19 04:22:45,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:22:45,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:45,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:45,921 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:45,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:22:45,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:22:45,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:45,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:22:45,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:46,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:22:46,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:22:46,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999694700] [2021-11-19 04:22:46,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:22:46,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732923356] [2021-11-19 04:22:46,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732923356] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:22:46,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:22:46,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-19 04:22:46,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465128279] [2021-11-19 04:22:46,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:46,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:22:46,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:46,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:22:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:22:46,234 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:22:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:22:46,368 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-11-19 04:22:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:22:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-19 04:22:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:22:46,370 INFO L225 Difference]: With dead ends: 68 [2021-11-19 04:22:46,371 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 04:22:46,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:22:46,373 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:22:46,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 76 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:22:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 04:22:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-11-19 04:22:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:22:46,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-11-19 04:22:46,385 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 31 [2021-11-19 04:22:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:22:46,386 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-11-19 04:22:46,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:22:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-11-19 04:22:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:22:46,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:22:46,388 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:22:46,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:22:46,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:46,603 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:22:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:22:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 4 times [2021-11-19 04:22:46,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:22:46,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854914989] [2021-11-19 04:22:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:22:46,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:22:46,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:22:46,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144330239] [2021-11-19 04:22:46,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:22:46,630 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:22:46,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:22:46,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:22:46,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:22:46,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:22:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:22:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:22:46,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:22:46,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:22:46,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:22:46,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:22:46,906 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-19 04:22:46,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:22:47,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:22:47,838 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-19 04:22:47,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 71 [2021-11-19 04:22:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:22:49,629 INFO L354 Elim1Store]: treesize reduction 98, result has 11.7 percent of original size [2021-11-19 04:22:49,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 69 [2021-11-19 04:22:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:22:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:22:50,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:22:50,276 INFO L354 Elim1Store]: treesize reduction 404, result has 3.1 percent of original size [2021-11-19 04:22:50,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 46 [2021-11-19 04:22:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:50,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:01,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:01,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854914989] [2021-11-19 04:23:01,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:23:01,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144330239] [2021-11-19 04:23:01,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144330239] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:01,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:23:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-19 04:23:01,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886554154] [2021-11-19 04:23:01,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:01,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:23:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:01,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:23:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=909, Unknown=6, NotChecked=0, Total=1122 [2021-11-19 04:23:01,161 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:01,549 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-11-19 04:23:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:23:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-19 04:23:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:01,558 INFO L225 Difference]: With dead ends: 85 [2021-11-19 04:23:01,558 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 04:23:01,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=249, Invalid=1005, Unknown=6, NotChecked=0, Total=1260 [2021-11-19 04:23:01,560 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:01,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 233 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2021-11-19 04:23:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 04:23:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-11-19 04:23:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:23:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-19 04:23:01,578 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 33 [2021-11-19 04:23:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:01,578 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-19 04:23:01,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-19 04:23:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-19 04:23:01,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:01,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:01,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:01,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:01,784 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:01,786 INFO L85 PathProgramCache]: Analyzing trace with hash -977921513, now seen corresponding path program 1 times [2021-11-19 04:23:01,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:01,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325100546] [2021-11-19 04:23:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:01,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:01,808 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:23:01,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998308489] [2021-11-19 04:23:01,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:01,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:01,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:01,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:01,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:23:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:01,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-19 04:23:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:01,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:23:01,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:23:02,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:02,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:02,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-19 04:23:02,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:03,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:03,023 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-19 04:23:03,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 72 [2021-11-19 04:23:04,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:04,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:23:04,764 INFO L354 Elim1Store]: treesize reduction 223, result has 22.6 percent of original size [2021-11-19 04:23:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 114 [2021-11-19 04:23:05,360 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-19 04:23:05,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 43 [2021-11-19 04:23:05,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:05,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:08,218 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~index~0#1| Int)) (or (<= c_~ARR_SIZE~0 |ULTIMATE.start_main_~index~0#1|) (< |ULTIMATE.start_main_~index~0#1| 0) (forall ((|v_ULTIMATE.start_main_#t~ite8#1_18| Int)) (or (<= (let ((.cse3 (* |ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|) (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (* |c_ULTIMATE.start_main_~num~0#1| (* |c_ULTIMATE.start_main_~count~0#1| |c_ULTIMATE.start_main_~num~0#1|)))))) (let ((.cse0 (store (select .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) |v_ULTIMATE.start_main_#t~ite8#1_18|))) (let ((.cse1 (select (store .cse2 |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|))))) (div (+ 2 c_~ARR_SIZE~0) 3)) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~count~0#1|) |v_ULTIMATE.start_main_#t~ite8#1_18|))))) is different from false [2021-11-19 04:23:08,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:08,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325100546] [2021-11-19 04:23:08,221 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:23:08,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998308489] [2021-11-19 04:23:08,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998308489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:08,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:23:08,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-19 04:23:08,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536638910] [2021-11-19 04:23:08,222 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:08,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:23:08,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:23:08,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=677, Unknown=3, NotChecked=54, Total=870 [2021-11-19 04:23:08,224 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:09,650 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2021-11-19 04:23:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:23:09,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-19 04:23:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:09,653 INFO L225 Difference]: With dead ends: 99 [2021-11-19 04:23:09,653 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 04:23:09,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=4, NotChecked=66, Total=1260 [2021-11-19 04:23:09,655 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:09,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 268 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 322 Invalid, 0 Unknown, 88 Unchecked, 0.4s Time] [2021-11-19 04:23:09,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 04:23:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-11-19 04:23:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:23:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-11-19 04:23:09,670 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 33 [2021-11-19 04:23:09,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:09,670 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-11-19 04:23:09,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 19 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:09,671 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-11-19 04:23:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:23:09,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:09,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:09,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 04:23:09,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 04:23:09,887 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:09,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1879614779, now seen corresponding path program 5 times [2021-11-19 04:23:09,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:09,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783534015] [2021-11-19 04:23:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:09,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:09,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:23:09,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367017321] [2021-11-19 04:23:09,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:23:09,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:09,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:09,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:23:09,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 04:23:09,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:23:09,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:23:10,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:10,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:23:10,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:10,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783534015] [2021-11-19 04:23:10,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:23:10,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367017321] [2021-11-19 04:23:10,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367017321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:10,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:23:10,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 04:23:10,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463387014] [2021-11-19 04:23:10,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:23:10,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:23:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:23:10,274 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:23:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:10,520 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-11-19 04:23:10,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:23:10,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-19 04:23:10,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:10,523 INFO L225 Difference]: With dead ends: 116 [2021-11-19 04:23:10,523 INFO L226 Difference]: Without dead ends: 104 [2021-11-19 04:23:10,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:23:10,524 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:10,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 114 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:23:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-19 04:23:10,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-11-19 04:23:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 72 states have internal predecessors, (83), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:23:10,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-11-19 04:23:10,541 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 35 [2021-11-19 04:23:10,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:10,541 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-11-19 04:23:10,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:23:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-11-19 04:23:10,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:23:10,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:10,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:10,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:10,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:10,758 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:10,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:10,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1373135831, now seen corresponding path program 6 times [2021-11-19 04:23:10,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:10,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040465858] [2021-11-19 04:23:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:10,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:10,783 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:23:10,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010980995] [2021-11-19 04:23:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:23:10,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:10,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:10,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:10,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:23:10,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 04:23:10,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:23:10,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:23:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:11,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:23:11,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:11,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040465858] [2021-11-19 04:23:11,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:23:11,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010980995] [2021-11-19 04:23:11,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010980995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:23:11,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:23:11,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 04:23:11,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319923220] [2021-11-19 04:23:11,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:11,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:23:11,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:23:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:23:11,172 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:23:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:11,376 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2021-11-19 04:23:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:23:11,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-19 04:23:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:11,378 INFO L225 Difference]: With dead ends: 103 [2021-11-19 04:23:11,378 INFO L226 Difference]: Without dead ends: 99 [2021-11-19 04:23:11,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:23:11,380 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 57 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:11,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 140 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:23:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-19 04:23:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-11-19 04:23:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:23:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2021-11-19 04:23:11,396 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 35 [2021-11-19 04:23:11,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:11,397 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2021-11-19 04:23:11,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:23:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2021-11-19 04:23:11,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:23:11,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:11,400 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:11,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:11,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:11,627 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:11,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1081807417, now seen corresponding path program 7 times [2021-11-19 04:23:11,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:11,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570158274] [2021-11-19 04:23:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:11,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:11,646 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:23:11,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040948806] [2021-11-19 04:23:11,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:23:11,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:11,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:11,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:11,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:23:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-19 04:23:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:23:11,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:23:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-19 04:23:12,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2021-11-19 04:23:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:12,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:13,042 INFO L354 Elim1Store]: treesize reduction 66, result has 40.0 percent of original size [2021-11-19 04:23:13,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 101 [2021-11-19 04:23:14,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:14,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:14,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:14,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:14,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:14,836 INFO L354 Elim1Store]: treesize reduction 164, result has 13.7 percent of original size [2021-11-19 04:23:14,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 9 case distinctions, treesize of input 109 treesize of output 118 [2021-11-19 04:23:20,531 INFO L354 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2021-11-19 04:23:20,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 89 [2021-11-19 04:23:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:23:20,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:25,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:25,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570158274] [2021-11-19 04:23:25,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:23:25,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040948806] [2021-11-19 04:23:25,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040948806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:25,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:23:25,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-19 04:23:25,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936520238] [2021-11-19 04:23:25,683 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:25,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-19 04:23:25,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-19 04:23:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=919, Unknown=8, NotChecked=0, Total=1056 [2021-11-19 04:23:25,686 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:27,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:27,261 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2021-11-19 04:23:27,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:23:27,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-19 04:23:27,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:27,264 INFO L225 Difference]: With dead ends: 115 [2021-11-19 04:23:27,264 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 04:23:27,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=173, Invalid=1078, Unknown=9, NotChecked=0, Total=1260 [2021-11-19 04:23:27,265 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:27,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 292 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 234 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2021-11-19 04:23:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 04:23:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 103. [2021-11-19 04:23:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 88 states have internal predecessors, (102), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:23:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2021-11-19 04:23:27,283 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 37 [2021-11-19 04:23:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:27,283 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2021-11-19 04:23:27,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 21 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:23:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2021-11-19 04:23:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:23:27,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:27,286 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:27,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:27,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:23:27,499 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:23:27,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash 70690167, now seen corresponding path program 2 times [2021-11-19 04:23:27,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:27,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109684239] [2021-11-19 04:23:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:27,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:27,512 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:23:27,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304818871] [2021-11-19 04:23:27,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:23:27,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:27,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:27,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:27,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:23:27,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:23:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:23:27,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-19 04:23:27,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:27,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:23:27,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:23:27,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:27,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:27,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-19 04:23:27,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:27,916 INFO L354 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2021-11-19 04:23:27,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 73 [2021-11-19 04:23:32,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:32,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:32,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:23:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:23:33,267 INFO L354 Elim1Store]: treesize reduction 822, result has 14.4 percent of original size [2021-11-19 04:23:33,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 64 case distinctions, treesize of input 136 treesize of output 232 [2021-11-19 04:23:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:23:42,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:23:42,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:23:42,769 INFO L354 Elim1Store]: treesize reduction 928, result has 12.9 percent of original size [2021-11-19 04:23:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 3 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 73 case distinctions, treesize of input 226 treesize of output 317 [2021-11-19 04:25:37,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:37,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:25:37,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:38,542 INFO L354 Elim1Store]: treesize reduction 1056, result has 23.2 percent of original size [2021-11-19 04:25:38,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 3 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 300 treesize of output 508 [2021-11-19 04:25:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:43,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:25:45,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:25:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109684239] [2021-11-19 04:25:45,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:25:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304818871] [2021-11-19 04:25:45,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304818871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:25:45,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:25:45,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-11-19 04:25:45,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397583479] [2021-11-19 04:25:45,862 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:25:45,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:25:45,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:25:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:25:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1205, Unknown=6, NotChecked=0, Total=1406 [2021-11-19 04:25:45,864 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:25:48,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:25:48,134 INFO L93 Difference]: Finished difference Result 120 states and 135 transitions. [2021-11-19 04:25:48,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:25:48,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-19 04:25:48,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:25:48,135 INFO L225 Difference]: With dead ends: 120 [2021-11-19 04:25:48,136 INFO L226 Difference]: Without dead ends: 116 [2021-11-19 04:25:48,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=218, Invalid=1415, Unknown=7, NotChecked=0, Total=1640 [2021-11-19 04:25:48,137 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 618 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:25:48,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 478 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 163 Invalid, 0 Unknown, 618 Unchecked, 0.3s Time] [2021-11-19 04:25:48,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-19 04:25:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2021-11-19 04:25:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 88 states have internal predecessors, (102), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:25:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2021-11-19 04:25:48,153 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 37 [2021-11-19 04:25:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:25:48,154 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2021-11-19 04:25:48,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 23 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:25:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2021-11-19 04:25:48,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:25:48,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:25:48,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:25:48,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:25:48,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:48,371 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:25:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:25:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 101371760, now seen corresponding path program 1 times [2021-11-19 04:25:48,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:25:48,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038411775] [2021-11-19 04:25:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:48,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:25:48,382 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:25:48,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393085202] [2021-11-19 04:25:48,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:25:48,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:25:48,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:25:48,400 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:25:48,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:25:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:25:48,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:25:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:25:48,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:25:48,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:25:49,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:25:49,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2021-11-19 04:25:51,060 INFO L354 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2021-11-19 04:25:51,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 44 [2021-11-19 04:25:52,278 INFO L354 Elim1Store]: treesize reduction 47, result has 2.1 percent of original size [2021-11-19 04:25:52,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-11-19 04:25:52,780 INFO L354 Elim1Store]: treesize reduction 61, result has 4.7 percent of original size [2021-11-19 04:25:52,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 47 [2021-11-19 04:25:53,144 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-11-19 04:25:53,144 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 42 treesize of output 28 [2021-11-19 04:25:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:25:53,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:04,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:04,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038411775] [2021-11-19 04:26:04,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:26:04,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393085202] [2021-11-19 04:26:04,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393085202] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:04,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:26:04,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-19 04:26:04,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380799064] [2021-11-19 04:26:04,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:04,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:26:04,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:26:04,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=693, Unknown=8, NotChecked=0, Total=870 [2021-11-19 04:26:04,064 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:26:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:04,222 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2021-11-19 04:26:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-19 04:26:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 39 [2021-11-19 04:26:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:04,224 INFO L225 Difference]: With dead ends: 122 [2021-11-19 04:26:04,224 INFO L226 Difference]: Without dead ends: 114 [2021-11-19 04:26:04,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=169, Invalid=693, Unknown=8, NotChecked=0, Total=870 [2021-11-19 04:26:04,226 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:04,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 184 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2021-11-19 04:26:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-19 04:26:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-19 04:26:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 96 states have (on average 1.15625) internal successors, (111), 96 states have internal predecessors, (111), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 04:26:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 127 transitions. [2021-11-19 04:26:04,242 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 127 transitions. Word has length 39 [2021-11-19 04:26:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:04,243 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 127 transitions. [2021-11-19 04:26:04,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 20 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:26:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 127 transitions. [2021-11-19 04:26:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:26:04,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:04,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:04,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:04,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:26:04,459 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:04,459 INFO L85 PathProgramCache]: Analyzing trace with hash -291655250, now seen corresponding path program 1 times [2021-11-19 04:26:04,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:04,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957337337] [2021-11-19 04:26:04,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:04,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:04,471 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:26:04,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822409655] [2021-11-19 04:26:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:04,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:04,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:04,476 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:04,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:26:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:26:04,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-19 04:26:04,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:26:04,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:26:05,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957337337] [2021-11-19 04:26:05,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:26:05,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822409655] [2021-11-19 04:26:05,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822409655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:05,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:26:05,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2021-11-19 04:26:05,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684966874] [2021-11-19 04:26:05,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:05,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:26:05,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:05,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:26:05,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:26:05,072 INFO L87 Difference]: Start difference. First operand 113 states and 127 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:26:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:05,565 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2021-11-19 04:26:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:26:05,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 39 [2021-11-19 04:26:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:05,568 INFO L225 Difference]: With dead ends: 178 [2021-11-19 04:26:05,568 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 04:26:05,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:26:05,569 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 85 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:05,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 171 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:26:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 04:26:05,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 113. [2021-11-19 04:26:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 04:26:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-11-19 04:26:05,585 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 39 [2021-11-19 04:26:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:05,585 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-11-19 04:26:05,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:26:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-11-19 04:26:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:26:05,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:05,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:05,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:05,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:05,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:05,803 INFO L85 PathProgramCache]: Analyzing trace with hash 288075803, now seen corresponding path program 8 times [2021-11-19 04:26:05,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:05,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879546671] [2021-11-19 04:26:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:05,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:05,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:26:05,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257744350] [2021-11-19 04:26:05,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:26:05,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:05,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:05,820 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:05,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:26:05,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:26:05,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:26:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:06,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:06,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:06,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879546671] [2021-11-19 04:26:06,153 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:26:06,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257744350] [2021-11-19 04:26:06,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257744350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:06,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:26:06,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-19 04:26:06,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294181100] [2021-11-19 04:26:06,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:06,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:26:06,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:06,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:26:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:26:06,155 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:26:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:06,759 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-19 04:26:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:26:06,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-19 04:26:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:06,761 INFO L225 Difference]: With dead ends: 165 [2021-11-19 04:26:06,762 INFO L226 Difference]: Without dead ends: 151 [2021-11-19 04:26:06,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:26:06,764 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 219 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:06,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 142 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:26:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-19 04:26:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 123. [2021-11-19 04:26:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:26:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2021-11-19 04:26:06,787 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 39 [2021-11-19 04:26:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:06,788 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2021-11-19 04:26:06,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:26:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2021-11-19 04:26:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-19 04:26:06,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:06,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:06,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-19 04:26:06,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:06,990 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:06,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1106888777, now seen corresponding path program 9 times [2021-11-19 04:26:06,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:06,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437992935] [2021-11-19 04:26:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:06,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:07,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:26:07,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731525166] [2021-11-19 04:26:07,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:26:07,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:07,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:07,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:07,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:26:07,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:26:07,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:07,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-19 04:26:07,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:07,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:26:07,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:07,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437992935] [2021-11-19 04:26:07,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:26:07,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731525166] [2021-11-19 04:26:07,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731525166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:26:07,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:26:07,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-19 04:26:07,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846616770] [2021-11-19 04:26:07,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:07,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:26:07,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:07,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:26:07,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:26:07,603 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:26:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:08,086 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2021-11-19 04:26:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:26:08,089 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-11-19 04:26:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:08,090 INFO L225 Difference]: With dead ends: 150 [2021-11-19 04:26:08,090 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 04:26:08,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:26:08,092 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:08,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 132 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:26:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 04:26:08,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 125. [2021-11-19 04:26:08,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 106 states have internal predecessors, (120), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:26:08,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2021-11-19 04:26:08,115 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 39 [2021-11-19 04:26:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:08,116 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2021-11-19 04:26:08,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:26:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2021-11-19 04:26:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:26:08,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:08,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:08,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:08,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:26:08,324 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:08,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1485008409, now seen corresponding path program 10 times [2021-11-19 04:26:08,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:08,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831863444] [2021-11-19 04:26:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:08,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:08,352 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:26:08,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262793147] [2021-11-19 04:26:08,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:26:08,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:08,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:08,354 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:08,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:26:08,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:26:08,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:26:08,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:08,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:26:08,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:26:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:26:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-19 04:26:09,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:09,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 103 [2021-11-19 04:26:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:10,515 INFO L354 Elim1Store]: treesize reduction 90, result has 39.6 percent of original size [2021-11-19 04:26:10,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 84 treesize of output 128 [2021-11-19 04:26:13,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:26:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:26:13,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:13,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:26:13,444 INFO L354 Elim1Store]: treesize reduction 589, result has 13.9 percent of original size [2021-11-19 04:26:13,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 54 case distinctions, treesize of input 124 treesize of output 154 [2021-11-19 04:26:15,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:15,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:26:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:15,037 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-19 04:26:15,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 115 treesize of output 57 [2021-11-19 04:26:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:26:15,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:26:28,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:26:28,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831863444] [2021-11-19 04:26:28,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:26:28,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262793147] [2021-11-19 04:26:28,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262793147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:26:28,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:26:28,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-19 04:26:28,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170104379] [2021-11-19 04:26:28,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:26:28,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:26:28,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:26:28,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:26:28,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1583, Unknown=6, NotChecked=0, Total=1892 [2021-11-19 04:26:28,296 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:26:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:26:32,954 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2021-11-19 04:26:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:26:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-19 04:26:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:26:32,957 INFO L225 Difference]: With dead ends: 165 [2021-11-19 04:26:32,957 INFO L226 Difference]: Without dead ends: 161 [2021-11-19 04:26:32,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=389, Invalid=1955, Unknown=8, NotChecked=0, Total=2352 [2021-11-19 04:26:32,959 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:26:32,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 296 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 549 Invalid, 0 Unknown, 99 Unchecked, 1.2s Time] [2021-11-19 04:26:32,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-19 04:26:32,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2021-11-19 04:26:32,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 04:26:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2021-11-19 04:26:32,987 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 41 [2021-11-19 04:26:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:26:32,987 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2021-11-19 04:26:32,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:26:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2021-11-19 04:26:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:26:32,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:26:32,990 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:26:33,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:26:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:26:33,203 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:26:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:26:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash 463940055, now seen corresponding path program 3 times [2021-11-19 04:26:33,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:26:33,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606525092] [2021-11-19 04:26:33,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:26:33,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:26:33,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:26:33,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292044228] [2021-11-19 04:26:33,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:26:33,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:26:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:26:33,223 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:26:33,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 04:26:33,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:26:33,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:26:33,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 04:26:33,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:26:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:26:33,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:26:33,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2021-11-19 04:26:33,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,656 INFO L354 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2021-11-19 04:26:33,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 67 [2021-11-19 04:26:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:33,970 INFO L354 Elim1Store]: treesize reduction 164, result has 16.8 percent of original size [2021-11-19 04:26:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 96 treesize of output 97 [2021-11-19 04:26:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:45,479 INFO L354 Elim1Store]: treesize reduction 257, result has 21.4 percent of original size [2021-11-19 04:26:45,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 106 treesize of output 156 [2021-11-19 04:26:49,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:49,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:26:49,733 INFO L354 Elim1Store]: treesize reduction 331, result has 18.5 percent of original size [2021-11-19 04:26:49,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 194 treesize of output 241 [2021-11-19 04:32:03,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:03,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:03,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:04,220 INFO L354 Elim1Store]: treesize reduction 770, result has 20.5 percent of original size [2021-11-19 04:32:04,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 6 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 236 treesize of output 342 [2021-11-19 04:32:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:08,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:32:23,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:32:23,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606525092] [2021-11-19 04:32:23,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:32:23,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292044228] [2021-11-19 04:32:23,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292044228] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:32:23,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:32:23,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-19 04:32:23,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201503904] [2021-11-19 04:32:23,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:32:23,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-19 04:32:23,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:32:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-19 04:32:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1652, Unknown=13, NotChecked=0, Total=1892 [2021-11-19 04:32:23,087 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:32:25,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:32:25,237 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2021-11-19 04:32:25,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-19 04:32:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-19 04:32:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:32:25,238 INFO L225 Difference]: With dead ends: 178 [2021-11-19 04:32:25,238 INFO L226 Difference]: Without dead ends: 174 [2021-11-19 04:32:25,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=255, Invalid=1987, Unknown=14, NotChecked=0, Total=2256 [2021-11-19 04:32:25,239 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:32:25,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 390 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 468 Unchecked, 0.2s Time] [2021-11-19 04:32:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-19 04:32:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2021-11-19 04:32:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 126 states have (on average 1.1428571428571428) internal successors, (144), 126 states have internal predecessors, (144), 11 states have call successors, (11), 11 states have call predecessors, (11), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 04:32:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 166 transitions. [2021-11-19 04:32:25,263 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 166 transitions. Word has length 41 [2021-11-19 04:32:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:32:25,263 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 166 transitions. [2021-11-19 04:32:25,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:32:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 166 transitions. [2021-11-19 04:32:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:32:25,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:32:25,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:32:25,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-19 04:32:25,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:32:25,479 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:32:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:32:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2111753712, now seen corresponding path program 2 times [2021-11-19 04:32:25,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:32:25,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094576892] [2021-11-19 04:32:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:32:25,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:32:25,488 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:32:25,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974069161] [2021-11-19 04:32:25,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:32:25,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:32:25,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:32:25,504 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:32:25,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 04:32:25,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:32:25,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:32:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-19 04:32:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:32:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:32:25,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:32:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:25,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:32:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:26,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:26,449 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-19 04:32:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 72 [2021-11-19 04:32:28,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:28,457 INFO L354 Elim1Store]: treesize reduction 98, result has 11.7 percent of original size [2021-11-19 04:32:28,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 69 [2021-11-19 04:32:34,298 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:32:34,876 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-19 04:32:34,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 74 treesize of output 80 [2021-11-19 04:32:37,662 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-11-19 04:32:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 66 [2021-11-19 04:32:43,170 INFO L354 Elim1Store]: treesize reduction 114, result has 5.8 percent of original size [2021-11-19 04:32:43,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 40 [2021-11-19 04:32:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:32:43,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:06,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:06,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094576892] [2021-11-19 04:33:06,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974069161] [2021-11-19 04:33:06,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974069161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:06,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:33:06,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-19 04:33:06,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568270923] [2021-11-19 04:33:06,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:06,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:33:06,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:33:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1119, Unknown=20, NotChecked=0, Total=1332 [2021-11-19 04:33:06,855 INFO L87 Difference]: Start difference. First operand 149 states and 166 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:33:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:07,306 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2021-11-19 04:33:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:33:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-19 04:33:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:07,308 INFO L225 Difference]: With dead ends: 173 [2021-11-19 04:33:07,308 INFO L226 Difference]: Without dead ends: 163 [2021-11-19 04:33:07,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=233, Invalid=1307, Unknown=20, NotChecked=0, Total=1560 [2021-11-19 04:33:07,309 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:07,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 186 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 128 Unchecked, 0.2s Time] [2021-11-19 04:33:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-19 04:33:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2021-11-19 04:33:07,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 134 states have internal predecessors, (153), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:33:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2021-11-19 04:33:07,336 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 43 [2021-11-19 04:33:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:07,336 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2021-11-19 04:33:07,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:33:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2021-11-19 04:33:07,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:33:07,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:07,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:07,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:07,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:33:07,547 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:07,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1853588274, now seen corresponding path program 2 times [2021-11-19 04:33:07,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:07,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901068829] [2021-11-19 04:33:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:07,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:07,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:07,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029564243] [2021-11-19 04:33:07,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:33:07,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:07,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:07,562 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:07,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 04:33:07,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:33:07,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 04:33:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:07,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:33:07,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:33:07,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:07,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:33:08,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:08,557 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-19 04:33:08,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 72 [2021-11-19 04:33:10,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:10,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:33:10,570 INFO L354 Elim1Store]: treesize reduction 260, result has 11.3 percent of original size [2021-11-19 04:33:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 69 treesize of output 65 [2021-11-19 04:33:16,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:33:16,143 INFO L354 Elim1Store]: treesize reduction 244, result has 17.8 percent of original size [2021-11-19 04:33:16,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 89 [2021-11-19 04:33:18,062 INFO L354 Elim1Store]: treesize reduction 311, result has 10.6 percent of original size [2021-11-19 04:33:18,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 127 treesize of output 104 [2021-11-19 04:33:22,600 INFO L354 Elim1Store]: treesize reduction 300, result has 8.8 percent of original size [2021-11-19 04:33:22,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 112 treesize of output 80 [2021-11-19 04:33:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:33:22,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:36,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:36,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901068829] [2021-11-19 04:33:36,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:36,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029564243] [2021-11-19 04:33:36,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029564243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:36,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:33:36,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-19 04:33:36,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625168530] [2021-11-19 04:33:36,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:36,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-19 04:33:36,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-19 04:33:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1133, Unknown=14, NotChecked=0, Total=1332 [2021-11-19 04:33:36,124 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:33:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:39,180 INFO L93 Difference]: Finished difference Result 178 states and 198 transitions. [2021-11-19 04:33:39,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:33:39,180 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-19 04:33:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:39,181 INFO L225 Difference]: With dead ends: 178 [2021-11-19 04:33:39,182 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 04:33:39,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=223, Invalid=1321, Unknown=16, NotChecked=0, Total=1560 [2021-11-19 04:33:39,183 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:39,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 469 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 160 Invalid, 0 Unknown, 452 Unchecked, 0.3s Time] [2021-11-19 04:33:39,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 04:33:39,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2021-11-19 04:33:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 134 states have internal predecessors, (153), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:33:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 177 transitions. [2021-11-19 04:33:39,207 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 177 transitions. Word has length 43 [2021-11-19 04:33:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:39,207 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 177 transitions. [2021-11-19 04:33:39,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 24 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:33:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 177 transitions. [2021-11-19 04:33:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:33:39,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:39,208 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:39,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:39,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:39,409 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:39,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1892898994, now seen corresponding path program 3 times [2021-11-19 04:33:39,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:39,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913699868] [2021-11-19 04:33:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:39,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:39,416 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:39,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968514751] [2021-11-19 04:33:39,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:33:39,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:39,422 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:39,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 04:33:39,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-19 04:33:39,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:39,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:33:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:39,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:33:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-19 04:33:39,643 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-19 04:33:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:33:39,996 INFO L354 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2021-11-19 04:33:39,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 42 [2021-11-19 04:33:40,972 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-11-19 04:33:40,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 84 [2021-11-19 04:33:44,310 WARN L322 ript$VariableManager]: TermVariabe |aux_mod_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:33:44,310 WARN L322 ript$VariableManager]: TermVariabe |aux_div_ULTIMATE.start_main_~index~0#1_40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-11-19 04:33:44,968 INFO L354 Elim1Store]: treesize reduction 250, result has 16.4 percent of original size [2021-11-19 04:33:44,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 98 [2021-11-19 04:33:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:33:47,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:59,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:59,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913699868] [2021-11-19 04:33:59,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:59,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968514751] [2021-11-19 04:33:59,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968514751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:59,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:33:59,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-19 04:33:59,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706346493] [2021-11-19 04:33:59,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:59,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:33:59,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:33:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=732, Unknown=7, NotChecked=0, Total=870 [2021-11-19 04:33:59,554 INFO L87 Difference]: Start difference. First operand 159 states and 177 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:34:02,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:02,620 INFO L93 Difference]: Finished difference Result 260 states and 291 transitions. [2021-11-19 04:34:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 04:34:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-19 04:34:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:02,622 INFO L225 Difference]: With dead ends: 260 [2021-11-19 04:34:02,622 INFO L226 Difference]: Without dead ends: 204 [2021-11-19 04:34:02,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=195, Invalid=986, Unknown=9, NotChecked=0, Total=1190 [2021-11-19 04:34:02,623 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:02,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2021-11-19 04:34:02,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-19 04:34:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 195. [2021-11-19 04:34:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 164 states have internal predecessors, (187), 15 states have call successors, (15), 15 states have call predecessors, (15), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-19 04:34:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 217 transitions. [2021-11-19 04:34:02,659 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 217 transitions. Word has length 43 [2021-11-19 04:34:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:02,659 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 217 transitions. [2021-11-19 04:34:02,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 14 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:34:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 217 transitions. [2021-11-19 04:34:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:34:02,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:02,661 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:02,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:02,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:02,871 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:34:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1634733556, now seen corresponding path program 1 times [2021-11-19 04:34:02,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:02,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581987013] [2021-11-19 04:34:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:02,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:02,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:34:02,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540864432] [2021-11-19 04:34:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:02,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:02,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:02,880 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:02,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 04:34:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:02,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 04:34:02,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:02,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:34:03,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:34:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:03,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:03,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:34:03,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:03,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:03,813 INFO L354 Elim1Store]: treesize reduction 50, result has 36.7 percent of original size [2021-11-19 04:34:03,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 72 [2021-11-19 04:34:05,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:05,645 INFO L354 Elim1Store]: treesize reduction 193, result has 11.9 percent of original size [2021-11-19 04:34:05,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 63 [2021-11-19 04:34:09,125 INFO L354 Elim1Store]: treesize reduction 230, result has 15.8 percent of original size [2021-11-19 04:34:09,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 81 [2021-11-19 04:34:09,877 INFO L354 Elim1Store]: treesize reduction 233, result has 12.1 percent of original size [2021-11-19 04:34:09,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 71 [2021-11-19 04:34:10,758 INFO L354 Elim1Store]: treesize reduction 104, result has 14.0 percent of original size [2021-11-19 04:34:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 42 [2021-11-19 04:34:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:10,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:19,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:19,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581987013] [2021-11-19 04:34:19,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:34:19,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540864432] [2021-11-19 04:34:19,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540864432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:34:19,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:34:19,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-19 04:34:19,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167381946] [2021-11-19 04:34:19,139 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:19,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:34:19,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:19,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:34:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1067, Unknown=6, NotChecked=0, Total=1260 [2021-11-19 04:34:19,140 INFO L87 Difference]: Start difference. First operand 195 states and 217 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:34:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:19,584 INFO L93 Difference]: Finished difference Result 217 states and 240 transitions. [2021-11-19 04:34:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:34:19,584 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2021-11-19 04:34:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:19,585 INFO L225 Difference]: With dead ends: 217 [2021-11-19 04:34:19,586 INFO L226 Difference]: Without dead ends: 207 [2021-11-19 04:34:19,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=199, Invalid=1127, Unknown=6, NotChecked=0, Total=1332 [2021-11-19 04:34:19,587 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:19,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 354 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 0 Unknown, 230 Unchecked, 0.3s Time] [2021-11-19 04:34:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-19 04:34:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2021-11-19 04:34:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 172 states have internal predecessors, (195), 16 states have call successors, (16), 16 states have call predecessors, (16), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 04:34:19,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2021-11-19 04:34:19,622 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 43 [2021-11-19 04:34:19,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:19,623 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2021-11-19 04:34:19,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 23 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:34:19,623 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2021-11-19 04:34:19,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:34:19,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:19,624 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:19,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:19,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:19,832 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:34:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1217172475, now seen corresponding path program 11 times [2021-11-19 04:34:19,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:19,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094808896] [2021-11-19 04:34:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:19,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:19,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:34:19,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658450894] [2021-11-19 04:34:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:34:19,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:19,852 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:19,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 04:34:19,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-19 04:34:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:34:19,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:34:19,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:20,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:34:20,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:20,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094808896] [2021-11-19 04:34:20,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:34:20,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658450894] [2021-11-19 04:34:20,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658450894] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:34:20,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:34:20,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-19 04:34:20,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015857147] [2021-11-19 04:34:20,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:34:20,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:20,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:34:20,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:34:20,302 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:34:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:21,185 INFO L93 Difference]: Finished difference Result 292 states and 315 transitions. [2021-11-19 04:34:21,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 04:34:21,186 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-19 04:34:21,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:21,187 INFO L225 Difference]: With dead ends: 292 [2021-11-19 04:34:21,187 INFO L226 Difference]: Without dead ends: 276 [2021-11-19 04:34:21,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=333, Invalid=927, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 04:34:21,189 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 248 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:21,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 178 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:34:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-19 04:34:21,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 230. [2021-11-19 04:34:21,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 193 states have (on average 1.1295336787564767) internal successors, (218), 193 states have internal predecessors, (218), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-19 04:34:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 254 transitions. [2021-11-19 04:34:21,227 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 254 transitions. Word has length 43 [2021-11-19 04:34:21,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:21,227 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 254 transitions. [2021-11-19 04:34:21,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:34:21,227 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 254 transitions. [2021-11-19 04:34:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-19 04:34:21,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:21,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:21,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:21,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-19 04:34:21,430 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:34:21,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:21,430 INFO L85 PathProgramCache]: Analyzing trace with hash 686007447, now seen corresponding path program 12 times [2021-11-19 04:34:21,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:21,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434177825] [2021-11-19 04:34:21,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:21,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:21,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:34:21,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1447074556] [2021-11-19 04:34:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:34:21,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:21,454 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:21,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 04:34:21,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-19 04:34:21,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:34:21,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:34:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:21,771 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:21,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:34:21,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:21,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434177825] [2021-11-19 04:34:21,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:34:21,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447074556] [2021-11-19 04:34:21,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447074556] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:34:21,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:34:21,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-19 04:34:21,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860078851] [2021-11-19 04:34:21,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:21,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:34:21,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:21,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:34:21,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:34:21,975 INFO L87 Difference]: Start difference. First operand 230 states and 254 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:34:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:22,562 INFO L93 Difference]: Finished difference Result 275 states and 295 transitions. [2021-11-19 04:34:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 04:34:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2021-11-19 04:34:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:22,565 INFO L225 Difference]: With dead ends: 275 [2021-11-19 04:34:22,565 INFO L226 Difference]: Without dead ends: 271 [2021-11-19 04:34:22,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:34:22,566 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 80 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:22,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 163 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:34:22,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-19 04:34:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 227. [2021-11-19 04:34:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 190 states have (on average 1.1263157894736842) internal successors, (214), 190 states have internal predecessors, (214), 18 states have call successors, (18), 18 states have call predecessors, (18), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-19 04:34:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 250 transitions. [2021-11-19 04:34:22,616 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 250 transitions. Word has length 43 [2021-11-19 04:34:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:22,616 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 250 transitions. [2021-11-19 04:34:22,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-19 04:34:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 250 transitions. [2021-11-19 04:34:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:34:22,618 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:22,618 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:22,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:22,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:22,831 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:34:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:22,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2118573319, now seen corresponding path program 13 times [2021-11-19 04:34:22,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:22,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581726862] [2021-11-19 04:34:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:22,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:22,840 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:34:22,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836280648] [2021-11-19 04:34:22,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:34:22,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:22,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:22,842 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:22,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 04:34:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:34:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:34:22,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:22,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:34:22,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:34:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-19 04:34:23,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-19 04:34:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2021-11-19 04:34:23,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:23,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-11-19 04:34:25,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:25,391 INFO L354 Elim1Store]: treesize reduction 114, result has 39.4 percent of original size [2021-11-19 04:34:25,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 161 [2021-11-19 04:34:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:28,004 INFO L354 Elim1Store]: treesize reduction 280, result has 13.6 percent of original size [2021-11-19 04:34:28,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 143 treesize of output 164 [2021-11-19 04:34:38,482 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:34:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 125 treesize of output 53 [2021-11-19 04:34:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:34:38,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:34:48,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:34:48,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581726862] [2021-11-19 04:34:48,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:34:48,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836280648] [2021-11-19 04:34:48,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836280648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:34:48,706 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:34:48,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-19 04:34:48,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115439461] [2021-11-19 04:34:48,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:34:48,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-19 04:34:48,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:34:48,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-19 04:34:48,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1838, Unknown=13, NotChecked=0, Total=2070 [2021-11-19 04:34:48,708 INFO L87 Difference]: Start difference. First operand 227 states and 250 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:34:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:34:53,258 INFO L93 Difference]: Finished difference Result 275 states and 307 transitions. [2021-11-19 04:34:53,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 04:34:53,259 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-19 04:34:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:34:53,260 INFO L225 Difference]: With dead ends: 275 [2021-11-19 04:34:53,261 INFO L226 Difference]: Without dead ends: 271 [2021-11-19 04:34:53,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=291, Invalid=2244, Unknown=15, NotChecked=0, Total=2550 [2021-11-19 04:34:53,263 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 34 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:34:53,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 355 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 813 Invalid, 0 Unknown, 58 Unchecked, 1.7s Time] [2021-11-19 04:34:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-19 04:34:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 243. [2021-11-19 04:34:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 204 states have (on average 1.1323529411764706) internal successors, (231), 204 states have internal predecessors, (231), 19 states have call successors, (19), 19 states have call predecessors, (19), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:34:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 269 transitions. [2021-11-19 04:34:53,315 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 269 transitions. Word has length 45 [2021-11-19 04:34:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:34:53,315 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 269 transitions. [2021-11-19 04:34:53,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 29 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:34:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 269 transitions. [2021-11-19 04:34:53,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:34:53,317 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:34:53,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:34:53,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 04:34:53,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 04:34:53,535 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:34:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:34:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash 182249271, now seen corresponding path program 4 times [2021-11-19 04:34:53,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:34:53,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086189169] [2021-11-19 04:34:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:34:53,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:34:53,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:34:53,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122666607] [2021-11-19 04:34:53,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:34:53,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:34:53,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:34:53,551 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:34:53,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 04:34:53,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:34:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:34:53,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:34:53,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:34:53,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:34:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:34:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:53,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-19 04:34:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-19 04:34:54,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2021-11-19 04:34:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:54,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 121 [2021-11-19 04:34:55,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:55,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:56,001 INFO L354 Elim1Store]: treesize reduction 134, result has 35.6 percent of original size [2021-11-19 04:34:56,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 162 [2021-11-19 04:34:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:34:58,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:34:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:34:58,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:58,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:34:58,569 INFO L354 Elim1Store]: treesize reduction 550, result has 17.4 percent of original size [2021-11-19 04:34:58,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 66 case distinctions, treesize of input 150 treesize of output 189 [2021-11-19 04:35:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:01,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:01,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 04:35:01,750 INFO L354 Elim1Store]: treesize reduction 60, result has 15.5 percent of original size [2021-11-19 04:35:01,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 10 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 209 treesize of output 95 [2021-11-19 04:35:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:35:02,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:35:16,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:35:16,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086189169] [2021-11-19 04:35:16,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:35:16,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122666607] [2021-11-19 04:35:16,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122666607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:35:16,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:35:16,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-11-19 04:35:16,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481431364] [2021-11-19 04:35:16,295 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:35:16,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 04:35:16,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:35:16,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 04:35:16,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2069, Unknown=6, NotChecked=0, Total=2450 [2021-11-19 04:35:16,297 INFO L87 Difference]: Start difference. First operand 243 states and 269 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:35:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:35:20,349 INFO L93 Difference]: Finished difference Result 279 states and 312 transitions. [2021-11-19 04:35:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:35:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-11-19 04:35:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:35:20,351 INFO L225 Difference]: With dead ends: 279 [2021-11-19 04:35:20,351 INFO L226 Difference]: Without dead ends: 275 [2021-11-19 04:35:20,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=543, Invalid=2642, Unknown=7, NotChecked=0, Total=3192 [2021-11-19 04:35:20,353 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:35:20,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 467 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 908 Invalid, 0 Unknown, 101 Unchecked, 1.7s Time] [2021-11-19 04:35:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-19 04:35:20,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 245. [2021-11-19 04:35:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 206 states have (on average 1.1359223300970873) internal successors, (234), 206 states have internal predecessors, (234), 19 states have call successors, (19), 19 states have call predecessors, (19), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-19 04:35:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 272 transitions. [2021-11-19 04:35:20,405 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 272 transitions. Word has length 45 [2021-11-19 04:35:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:35:20,405 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 272 transitions. [2021-11-19 04:35:20,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 31 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:35:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 272 transitions. [2021-11-19 04:35:20,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:35:20,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:35:20,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:35:20,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-19 04:35:20,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 04:35:20,623 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:35:20,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:35:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash 571342256, now seen corresponding path program 3 times [2021-11-19 04:35:20,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:35:20,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846981145] [2021-11-19 04:35:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:35:20,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:35:20,630 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:35:20,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773797114] [2021-11-19 04:35:20,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:35:20,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:35:20,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:35:20,633 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:35:20,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8eb0a86a-97d0-4ba1-94bc-7b92210ea7c8/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 04:35:20,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 04:35:20,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:35:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 04:35:20,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:35:20,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 04:35:20,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-19 04:35:20,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:20,866 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-19 04:35:20,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 39 [2021-11-19 04:35:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:21,016 INFO L354 Elim1Store]: treesize reduction 118, result has 21.9 percent of original size [2021-11-19 04:35:21,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 67 [2021-11-19 04:35:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:27,365 INFO L354 Elim1Store]: treesize reduction 144, result has 25.0 percent of original size [2021-11-19 04:35:27,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 82 treesize of output 116 [2021-11-19 04:35:31,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:35:31,299 INFO L354 Elim1Store]: treesize reduction 236, result has 10.6 percent of original size [2021-11-19 04:35:31,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 124 treesize of output 133