./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:40:09,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:40:09,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:40:09,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:40:09,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:40:09,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:40:09,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:40:09,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:40:09,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:40:09,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:40:09,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:40:09,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:40:09,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:40:09,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:40:09,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:40:09,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:40:09,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:40:09,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:40:09,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:40:09,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:40:09,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:40:09,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:40:09,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:40:09,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:40:09,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:40:09,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:40:09,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:40:09,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:40:09,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:40:09,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:40:09,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:40:09,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:40:09,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:40:09,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:40:09,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:40:09,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:40:09,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:40:09,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:40:09,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:40:09,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:40:09,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:40:09,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:40:09,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:40:09,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:40:09,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:40:09,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:40:09,315 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:40:09,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:40:09,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:40:09,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:40:09,316 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:40:09,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:40:09,318 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:40:09,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:40:09,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:40:09,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:40:09,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:40:09,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:40:09,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:40:09,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:40:09,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:40:09,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:40:09,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:40:09,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:40:09,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:40:09,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:40:09,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:40:09,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:40:09,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:40:09,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:40:09,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:40:09,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:40:09,323 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:40:09,323 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:40:09,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:40:09,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:40:09,324 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_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e [2021-11-20 07:40:09,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:40:09,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:40:09,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:40:09,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:40:09,659 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:40:09,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-11-20 07:40:09,730 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/data/b87bb9d5f/c8f7af4cad484697a03350c086de34fa/FLAGadb727012 [2021-11-20 07:40:10,256 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:40:10,256 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-11-20 07:40:10,264 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/data/b87bb9d5f/c8f7af4cad484697a03350c086de34fa/FLAGadb727012 [2021-11-20 07:40:10,623 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/data/b87bb9d5f/c8f7af4cad484697a03350c086de34fa [2021-11-20 07:40:10,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:40:10,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:40:10,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:40:10,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:40:10,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:40:10,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:10,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37d7a614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10, skipping insertion in model container [2021-11-20 07:40:10,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:10,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:40:10,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:40:10,883 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_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2021-11-20 07:40:10,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:40:10,920 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:40:10,933 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_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2021-11-20 07:40:10,944 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:40:10,959 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:40:10,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10 WrapperNode [2021-11-20 07:40:10,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:40:10,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:40:10,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:40:10,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:40:10,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:10,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:10,994 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-11-20 07:40:10,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:40:10,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:40:10,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:40:10,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:40:11,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,017 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:40:11,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:40:11,022 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:40:11,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:40:11,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (1/1) ... [2021-11-20 07:40:11,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:40:11,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:11,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:40:11,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:40:11,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:40:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 07:40:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 07:40:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:40:11,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:40:11,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:40:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:40:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:40:11,179 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:40:11,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:40:11,331 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:40:11,337 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:40:11,338 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:40:11,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:40:11 BoogieIcfgContainer [2021-11-20 07:40:11,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:40:11,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:40:11,342 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:40:11,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:40:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:40:10" (1/3) ... [2021-11-20 07:40:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d1378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:40:11, skipping insertion in model container [2021-11-20 07:40:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:40:10" (2/3) ... [2021-11-20 07:40:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58d1378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:40:11, skipping insertion in model container [2021-11-20 07:40:11,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:40:11" (3/3) ... [2021-11-20 07:40:11,349 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2021-11-20 07:40:11,355 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:40:11,355 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:40:11,409 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:40:11,417 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:40:11,418 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:40:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:40:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:40:11,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:11,445 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:11,446 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:11,458 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-11-20 07:40:11,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:11,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737119777] [2021-11-20 07:40:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:11,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:11,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:40:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:11,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-20 07:40:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:11,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 07:40:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-20 07:40:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:11,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:11,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737119777] [2021-11-20 07:40:11,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737119777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:40:11,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:40:11,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:40:11,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444924137] [2021-11-20 07:40:11,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:11,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:40:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:11,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:40:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:40:11,827 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:40:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:11,853 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-11-20 07:40:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:40:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-11-20 07:40:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:11,873 INFO L225 Difference]: With dead ends: 67 [2021-11-20 07:40:11,873 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 07:40:11,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:40:11,901 INFO L933 BasicCegarLoop]: 44 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, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:11,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:40:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 07:40:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 07:40:11,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:40:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-11-20 07:40:11,974 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-11-20 07:40:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:11,975 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-11-20 07:40:11,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:40:11,975 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-11-20 07:40:11,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:40:11,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:11,979 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:11,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:40:11,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:11,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:11,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-11-20 07:40:11,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:11,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878705072] [2021-11-20 07:40:11,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:11,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:12,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:12,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456825255] [2021-11-20 07:40:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:12,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:12,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:12,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:40:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:12,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:40:12,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:40:12,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:40:12,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878705072] [2021-11-20 07:40:12,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:12,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456825255] [2021-11-20 07:40:12,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456825255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:40:12,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:40:12,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 07:40:12,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516447935] [2021-11-20 07:40:12,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:12,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:40:12,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:40:12,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:40:12,356 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:12,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:12,508 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-11-20 07:40:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:40:12,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-11-20 07:40:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:12,513 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:40:12,513 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 07:40:12,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:40:12,516 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:12,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:40:12,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 07:40:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-11-20 07:40:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:40:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-20 07:40:12,547 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-11-20 07:40:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-20 07:40:12,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:12,548 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-20 07:40:12,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:40:12,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:12,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:12,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:12,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:12,765 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:12,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-11-20 07:40:12,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:12,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71128382] [2021-11-20 07:40:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:12,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:12,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:12,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276795695] [2021-11-20 07:40:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:12,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:12,801 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:12,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:40:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:12,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:40:12,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:40:13,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:13,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:13,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71128382] [2021-11-20 07:40:13,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:13,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276795695] [2021-11-20 07:40:13,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276795695] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:13,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:40:13,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-11-20 07:40:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650654779] [2021-11-20 07:40:13,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:13,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:40:13,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:13,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:40:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:40:13,677 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:13,771 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-11-20 07:40:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:40:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-11-20 07:40:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:13,774 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:40:13,774 INFO L226 Difference]: Without dead ends: 47 [2021-11-20 07:40:13,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:40:13,776 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:13,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:40:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-20 07:40:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-11-20 07:40:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-20 07:40:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-11-20 07:40:13,789 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-11-20 07:40:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:13,789 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-11-20 07:40:13,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-11-20 07:40:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:40:13,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:13,792 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:13,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:14,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:14,017 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:14,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-11-20 07:40:14,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:14,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917257793] [2021-11-20 07:40:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:14,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:14,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:14,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698511271] [2021-11-20 07:40:14,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:14,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:14,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:14,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:40:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:14,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:40:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:40:14,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:40:14,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:14,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917257793] [2021-11-20 07:40:14,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:14,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698511271] [2021-11-20 07:40:14,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698511271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:14,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:14,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 07:40:14,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697373762] [2021-11-20 07:40:14,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:14,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:40:14,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:40:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:40:14,366 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:40:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:14,597 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-11-20 07:40:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:40:14,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 07:40:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:14,606 INFO L225 Difference]: With dead ends: 99 [2021-11-20 07:40:14,606 INFO L226 Difference]: Without dead ends: 92 [2021-11-20 07:40:14,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:40:14,614 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:14,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 308 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:40:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-20 07:40:14,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-11-20 07:40:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 07:40:14,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-11-20 07:40:14,635 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-11-20 07:40:14,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:14,635 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-11-20 07:40:14,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:40:14,636 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-11-20 07:40:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:40:14,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:14,638 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:14,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:14,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:14,857 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-11-20 07:40:14,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:14,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033778234] [2021-11-20 07:40:14,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:14,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:14,873 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:14,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897714673] [2021-11-20 07:40:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:14,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:14,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:14,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:40:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:40:14,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:40:15,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:15,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033778234] [2021-11-20 07:40:15,501 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:15,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897714673] [2021-11-20 07:40:15,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897714673] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:15,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:40:15,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-11-20 07:40:15,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400310659] [2021-11-20 07:40:15,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:15,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:40:15,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:40:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:40:15,505 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:40:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:15,605 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-11-20 07:40:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:40:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-11-20 07:40:15,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:15,611 INFO L225 Difference]: With dead ends: 75 [2021-11-20 07:40:15,612 INFO L226 Difference]: Without dead ends: 73 [2021-11-20 07:40:15,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:40:15,614 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:15,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 172 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:40:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-20 07:40:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-11-20 07:40:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 07:40:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-11-20 07:40:15,638 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-11-20 07:40:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:15,639 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-11-20 07:40:15,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:40:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-11-20 07:40:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 07:40:15,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:15,641 INFO L514 BasicCegarLoop]: trace histogram [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, 1] [2021-11-20 07:40:15,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 07:40:15,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:15,869 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:15,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-11-20 07:40:15,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:15,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563193912] [2021-11-20 07:40:15,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:15,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:15,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830036287] [2021-11-20 07:40:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:15,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:15,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:15,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:40:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:40:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:16,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:16,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563193912] [2021-11-20 07:40:16,390 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830036287] [2021-11-20 07:40:16,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830036287] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:16,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:16,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-20 07:40:16,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545863871] [2021-11-20 07:40:16,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:16,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:40:16,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:16,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:40:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:40:16,394 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:16,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:16,446 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2021-11-20 07:40:16,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:40:16,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-11-20 07:40:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:16,450 INFO L225 Difference]: With dead ends: 87 [2021-11-20 07:40:16,450 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 07:40:16,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:40:16,455 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:16,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 191 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-11-20 07:40:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 07:40:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-11-20 07:40:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 60 states have internal predecessors, (71), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 07:40:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-11-20 07:40:16,494 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 38 [2021-11-20 07:40:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:16,494 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-11-20 07:40:16,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-11-20 07:40:16,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:40:16,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:16,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:16,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:16,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:40:16,729 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-11-20 07:40:16,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:16,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530376700] [2021-11-20 07:40:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:16,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:16,742 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:16,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138808524] [2021-11-20 07:40:16,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:16,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:16,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:16,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:16,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:40:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:16,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:40:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:40:16,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:40:16,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:16,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530376700] [2021-11-20 07:40:16,952 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:16,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138808524] [2021-11-20 07:40:16,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138808524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:40:16,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:40:16,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:40:16,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171462326] [2021-11-20 07:40:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:16,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:40:16,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:40:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:40:16,957 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:40:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:17,022 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2021-11-20 07:40:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:40:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-11-20 07:40:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:17,025 INFO L225 Difference]: With dead ends: 112 [2021-11-20 07:40:17,025 INFO L226 Difference]: Without dead ends: 110 [2021-11-20 07:40:17,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:40:17,027 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:17,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:40:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-20 07:40:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-11-20 07:40:17,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 71 states have internal predecessors, (86), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 07:40:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2021-11-20 07:40:17,069 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 43 [2021-11-20 07:40:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:17,072 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2021-11-20 07:40:17,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:40:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2021-11-20 07:40:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:40:17,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:17,079 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:17,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:17,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:40:17,294 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:17,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-11-20 07:40:17,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:17,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789559736] [2021-11-20 07:40:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:17,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:17,319 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:17,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627869847] [2021-11-20 07:40:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:17,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:17,324 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:17,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:40:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:40:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:40:18,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:18,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789559736] [2021-11-20 07:40:18,353 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:18,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627869847] [2021-11-20 07:40:18,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627869847] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:18,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:18,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2021-11-20 07:40:18,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705572699] [2021-11-20 07:40:18,355 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:18,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:40:18,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:40:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:40:18,356 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:40:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:21,078 INFO L93 Difference]: Finished difference Result 244 states and 356 transitions. [2021-11-20 07:40:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:40:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 43 [2021-11-20 07:40:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:21,090 INFO L225 Difference]: With dead ends: 244 [2021-11-20 07:40:21,090 INFO L226 Difference]: Without dead ends: 242 [2021-11-20 07:40:21,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:40:21,092 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 219 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:21,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 397 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 07:40:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-20 07:40:21,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 174. [2021-11-20 07:40:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 119 states have (on average 1.26890756302521) internal successors, (151), 121 states have internal predecessors, (151), 46 states have call successors, (46), 8 states have call predecessors, (46), 8 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2021-11-20 07:40:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 242 transitions. [2021-11-20 07:40:21,138 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 242 transitions. Word has length 43 [2021-11-20 07:40:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:21,138 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 242 transitions. [2021-11-20 07:40:21,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-20 07:40:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 242 transitions. [2021-11-20 07:40:21,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:40:21,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:21,140 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:21,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:21,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:21,357 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-11-20 07:40:21,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:21,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786504420] [2021-11-20 07:40:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:21,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:21,381 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:21,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585047405] [2021-11-20 07:40:21,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:40:21,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:21,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:21,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:21,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:40:21,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:40:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:40:21,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:40:21,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:40:21,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:40:21,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:21,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786504420] [2021-11-20 07:40:21,526 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:21,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585047405] [2021-11-20 07:40:21,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585047405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:40:21,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:40:21,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:40:21,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536280795] [2021-11-20 07:40:21,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:21,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:40:21,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:40:21,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:40:21,532 INFO L87 Difference]: Start difference. First operand 174 states and 242 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:21,636 INFO L93 Difference]: Finished difference Result 236 states and 329 transitions. [2021-11-20 07:40:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:40:21,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-11-20 07:40:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:21,640 INFO L225 Difference]: With dead ends: 236 [2021-11-20 07:40:21,640 INFO L226 Difference]: Without dead ends: 116 [2021-11-20 07:40:21,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:40:21,649 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:21,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:40:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-20 07:40:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 104. [2021-11-20 07:40:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 07:40:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2021-11-20 07:40:21,677 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 43 [2021-11-20 07:40:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:21,677 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2021-11-20 07:40:21,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 07:40:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2021-11-20 07:40:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:40:21,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:21,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:21,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 07:40:21,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:21,898 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:21,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:21,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-11-20 07:40:21,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:21,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072722472] [2021-11-20 07:40:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:21,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:21,920 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:21,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230911349] [2021-11-20 07:40:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:21,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:21,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:21,935 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:21,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:40:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:21,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:40:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:40:22,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:40:22,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:22,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072722472] [2021-11-20 07:40:22,137 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230911349] [2021-11-20 07:40:22,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230911349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:40:22,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:40:22,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:40:22,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440970524] [2021-11-20 07:40:22,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:22,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:40:22,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:22,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:40:22,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:40:22,140 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:40:22,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:22,213 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-11-20 07:40:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:40:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-11-20 07:40:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:22,217 INFO L225 Difference]: With dead ends: 154 [2021-11-20 07:40:22,217 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 07:40:22,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:40:22,218 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:22,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:40:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 07:40:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-11-20 07:40:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 07:40:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-11-20 07:40:22,258 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-11-20 07:40:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-11-20 07:40:22,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:40:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-11-20 07:40:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:40:22,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:22,260 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:22,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:22,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:22,478 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:22,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:22,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1402581238, now seen corresponding path program 1 times [2021-11-20 07:40:22,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:22,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104148481] [2021-11-20 07:40:22,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:22,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:22,490 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277644957] [2021-11-20 07:40:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:22,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:22,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:22,491 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:22,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:40:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:22,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:40:22,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 07:40:22,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-20 07:40:22,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:22,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104148481] [2021-11-20 07:40:22,931 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277644957] [2021-11-20 07:40:22,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277644957] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:22,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:22,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-11-20 07:40:22,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591068036] [2021-11-20 07:40:22,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:22,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:40:22,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:22,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:40:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:40:22,935 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 07:40:23,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:23,143 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-11-20 07:40:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:40:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2021-11-20 07:40:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:23,146 INFO L225 Difference]: With dead ends: 142 [2021-11-20 07:40:23,146 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 07:40:23,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:40:23,147 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:23,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 142 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:40:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 07:40:23,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-11-20 07:40:23,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 83 states have internal predecessors, (88), 53 states have call successors, (53), 10 states have call predecessors, (53), 10 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-20 07:40:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-11-20 07:40:23,185 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 60 [2021-11-20 07:40:23,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:23,185 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-11-20 07:40:23,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 07:40:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-11-20 07:40:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:40:23,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:23,187 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:40:23,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:23,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:23,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-11-20 07:40:23,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:23,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875269633] [2021-11-20 07:40:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:23,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:23,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:23,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85277978] [2021-11-20 07:40:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:23,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:23,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:23,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:40:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:23,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-20 07:40:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:40:24,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-20 07:40:26,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875269633] [2021-11-20 07:40:26,683 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:26,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85277978] [2021-11-20 07:40:26,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85277978] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:26,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:26,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-11-20 07:40:26,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014988112] [2021-11-20 07:40:26,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:26,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 07:40:26,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 07:40:26,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:40:26,686 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 07:40:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:36,253 INFO L93 Difference]: Finished difference Result 322 states and 458 transitions. [2021-11-20 07:40:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-20 07:40:36,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-11-20 07:40:36,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:36,257 INFO L225 Difference]: With dead ends: 322 [2021-11-20 07:40:36,257 INFO L226 Difference]: Without dead ends: 249 [2021-11-20 07:40:36,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=548, Invalid=2208, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 07:40:36,259 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 134 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:36,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 440 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-20 07:40:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-20 07:40:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-11-20 07:40:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 120 states have (on average 1.1666666666666667) internal successors, (140), 127 states have internal predecessors, (140), 73 states have call successors, (73), 13 states have call predecessors, (73), 13 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 07:40:36,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 285 transitions. [2021-11-20 07:40:36,321 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 285 transitions. Word has length 60 [2021-11-20 07:40:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:36,321 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 285 transitions. [2021-11-20 07:40:36,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 07:40:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 285 transitions. [2021-11-20 07:40:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:40:36,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:36,323 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 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, 1] [2021-11-20 07:40:36,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:36,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:40:36,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:36,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:36,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-11-20 07:40:36,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:36,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75896590] [2021-11-20 07:40:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:36,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:36,554 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:36,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923698523] [2021-11-20 07:40:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:36,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:36,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:36,577 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:36,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:40:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:40:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-20 07:40:37,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-20 07:40:37,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75896590] [2021-11-20 07:40:37,301 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923698523] [2021-11-20 07:40:37,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923698523] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:40:37,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:40:37,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2021-11-20 07:40:37,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032674022] [2021-11-20 07:40:37,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:40:37,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:40:37,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:40:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:40:37,303 INFO L87 Difference]: Start difference. First operand 207 states and 285 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 07:40:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:37,398 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2021-11-20 07:40:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:40:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-11-20 07:40:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:37,401 INFO L225 Difference]: With dead ends: 213 [2021-11-20 07:40:37,401 INFO L226 Difference]: Without dead ends: 211 [2021-11-20 07:40:37,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:40:37,402 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:37,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 129 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:40:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-20 07:40:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-11-20 07:40:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 130 states have internal predecessors, (143), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 07:40:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 288 transitions. [2021-11-20 07:40:37,467 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 288 transitions. Word has length 70 [2021-11-20 07:40:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:37,468 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 288 transitions. [2021-11-20 07:40:37,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-20 07:40:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 288 transitions. [2021-11-20 07:40:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:40:37,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:37,469 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2021-11-20 07:40:37,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:37,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:40:37,698 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:37,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-11-20 07:40:37,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:37,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125754313] [2021-11-20 07:40:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:37,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:37,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:37,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [935912489] [2021-11-20 07:40:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:37,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:37,723 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:37,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:40:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:37,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:40:37,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 07:40:38,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-20 07:40:38,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125754313] [2021-11-20 07:40:38,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:38,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935912489] [2021-11-20 07:40:38,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935912489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:38,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:38,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-20 07:40:38,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269662071] [2021-11-20 07:40:38,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:38,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:40:38,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:38,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:40:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:40:38,307 INFO L87 Difference]: Start difference. First operand 211 states and 288 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 07:40:38,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:38,685 INFO L93 Difference]: Finished difference Result 323 states and 439 transitions. [2021-11-20 07:40:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:40:38,685 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 68 [2021-11-20 07:40:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:38,688 INFO L225 Difference]: With dead ends: 323 [2021-11-20 07:40:38,688 INFO L226 Difference]: Without dead ends: 210 [2021-11-20 07:40:38,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:40:38,689 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 59 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:38,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 372 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:40:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-20 07:40:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 196. [2021-11-20 07:40:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 117 states have internal predecessors, (128), 69 states have call successors, (69), 14 states have call predecessors, (69), 14 states have return successors, (68), 64 states have call predecessors, (68), 68 states have call successors, (68) [2021-11-20 07:40:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 265 transitions. [2021-11-20 07:40:38,762 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 265 transitions. Word has length 68 [2021-11-20 07:40:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:38,763 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 265 transitions. [2021-11-20 07:40:38,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-20 07:40:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 265 transitions. [2021-11-20 07:40:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-20 07:40:38,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:38,765 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-11-20 07:40:38,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:38,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:40:38,981 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:38,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash 930066712, now seen corresponding path program 1 times [2021-11-20 07:40:38,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:38,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287777758] [2021-11-20 07:40:38,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:38,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:38,990 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:38,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253729306] [2021-11-20 07:40:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:38,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:38,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:39,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:40:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:39,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:40:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 07:40:39,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-11-20 07:40:40,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287777758] [2021-11-20 07:40:40,150 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253729306] [2021-11-20 07:40:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253729306] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:40,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:40,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-11-20 07:40:40,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868125281] [2021-11-20 07:40:40,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:40,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:40:40,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:40:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:40:40,154 INFO L87 Difference]: Start difference. First operand 196 states and 265 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-20 07:40:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:40:41,304 INFO L93 Difference]: Finished difference Result 283 states and 383 transitions. [2021-11-20 07:40:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:40:41,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 85 [2021-11-20 07:40:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:40:41,307 INFO L225 Difference]: With dead ends: 283 [2021-11-20 07:40:41,307 INFO L226 Difference]: Without dead ends: 178 [2021-11-20 07:40:41,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 07:40:41,309 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 111 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:40:41,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 525 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 374 Invalid, 0 Unknown, 39 Unchecked, 0.5s Time] [2021-11-20 07:40:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-20 07:40:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-20 07:40:41,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 104 states have internal predecessors, (113), 65 states have call successors, (65), 12 states have call predecessors, (65), 12 states have return successors, (64), 60 states have call predecessors, (64), 64 states have call successors, (64) [2021-11-20 07:40:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 242 transitions. [2021-11-20 07:40:41,371 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 242 transitions. Word has length 85 [2021-11-20 07:40:41,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:40:41,371 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 242 transitions. [2021-11-20 07:40:41,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-11-20 07:40:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 242 transitions. [2021-11-20 07:40:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-20 07:40:41,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:40:41,373 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1] [2021-11-20 07:40:41,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:40:41,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:41,589 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:40:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:40:41,589 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-11-20 07:40:41,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:40:41,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822737920] [2021-11-20 07:40:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:41,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:40:41,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:40:41,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082039800] [2021-11-20 07:40:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:40:41,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:40:41,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:40:41,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:40:41,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:40:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:40:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-20 07:40:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:40:42,821 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 07:40:42,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:40:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-20 07:40:44,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:40:44,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822737920] [2021-11-20 07:40:44,690 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:40:44,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082039800] [2021-11-20 07:40:44,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082039800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:40:44,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:40:44,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-11-20 07:40:44,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887722771] [2021-11-20 07:40:44,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:40:44,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:40:44,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:40:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:40:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:40:44,692 INFO L87 Difference]: Start difference. First operand 177 states and 242 transitions. Second operand has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:40:52,994 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:40:58,889 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:03,406 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:05,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:07,579 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:12,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:23,428 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:26,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:28,924 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:35,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:45,141 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:47,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:51,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:56,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:57,952 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:41:59,965 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:42:01,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:42:04,053 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 07:42:04,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:04,057 INFO L93 Difference]: Finished difference Result 337 states and 474 transitions. [2021-11-20 07:42:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 07:42:04,058 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 87 [2021-11-20 07:42:04,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:04,061 INFO L225 Difference]: With dead ends: 337 [2021-11-20 07:42:04,061 INFO L226 Difference]: Without dead ends: 333 [2021-11-20 07:42:04,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=1182, Invalid=6300, Unknown=0, NotChecked=0, Total=7482 [2021-11-20 07:42:04,065 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 233 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 541 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 2241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:04,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 810 Invalid, 2241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 1687 Invalid, 13 Unknown, 0 Unchecked, 50.9s Time] [2021-11-20 07:42:04,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-20 07:42:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 271. [2021-11-20 07:42:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 151 states have (on average 1.1655629139072847) internal successors, (176), 157 states have internal predecessors, (176), 101 states have call successors, (101), 18 states have call predecessors, (101), 18 states have return successors, (100), 95 states have call predecessors, (100), 100 states have call successors, (100) [2021-11-20 07:42:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 377 transitions. [2021-11-20 07:42:04,171 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 377 transitions. Word has length 87 [2021-11-20 07:42:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:04,172 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 377 transitions. [2021-11-20 07:42:04,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:42:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 377 transitions. [2021-11-20 07:42:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-20 07:42:04,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:04,174 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 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] [2021-11-20 07:42:04,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:04,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:04,375 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2021-11-20 07:42:04,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:04,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872855415] [2021-11-20 07:42:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:04,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:04,384 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:42:04,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051833828] [2021-11-20 07:42:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:04,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:04,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:04,397 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:04,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:42:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:04,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:42:04,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-11-20 07:42:04,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-20 07:42:05,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:05,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872855415] [2021-11-20 07:42:05,215 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:42:05,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051833828] [2021-11-20 07:42:05,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051833828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:05,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:05,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-20 07:42:05,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386535375] [2021-11-20 07:42:05,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:05,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:42:05,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:42:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:42:05,217 INFO L87 Difference]: Start difference. First operand 271 states and 377 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-20 07:42:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:05,714 INFO L93 Difference]: Finished difference Result 410 states and 565 transitions. [2021-11-20 07:42:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:42:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 90 [2021-11-20 07:42:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:05,718 INFO L225 Difference]: With dead ends: 410 [2021-11-20 07:42:05,718 INFO L226 Difference]: Without dead ends: 218 [2021-11-20 07:42:05,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:42:05,720 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 62 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:05,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 400 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:42:05,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-20 07:42:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 212. [2021-11-20 07:42:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1693548387096775) internal successors, (145), 125 states have internal predecessors, (145), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-11-20 07:42:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 290 transitions. [2021-11-20 07:42:05,806 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 290 transitions. Word has length 90 [2021-11-20 07:42:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:05,806 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 290 transitions. [2021-11-20 07:42:05,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-11-20 07:42:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 290 transitions. [2021-11-20 07:42:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-20 07:42:05,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:05,808 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:05,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:06,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:42:06,029 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash 453133023, now seen corresponding path program 2 times [2021-11-20 07:42:06,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:06,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866352110] [2021-11-20 07:42:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:06,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:06,038 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:42:06,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350918379] [2021-11-20 07:42:06,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:42:06,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:06,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:06,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:06,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:42:06,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:42:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:42:06,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-11-20 07:42:06,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:10,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866352110] [2021-11-20 07:42:10,221 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:42:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350918379] [2021-11-20 07:42:10,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350918379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:10,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:42:10,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-20 07:42:10,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851795168] [2021-11-20 07:42:10,222 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:10,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:42:10,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:42:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:42:10,224 INFO L87 Difference]: Start difference. First operand 212 states and 290 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 07:42:10,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:10,873 INFO L93 Difference]: Finished difference Result 352 states and 500 transitions. [2021-11-20 07:42:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:42:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 112 [2021-11-20 07:42:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:10,877 INFO L225 Difference]: With dead ends: 352 [2021-11-20 07:42:10,877 INFO L226 Difference]: Without dead ends: 276 [2021-11-20 07:42:10,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:42:10,879 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 59 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:10,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 318 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:42:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-20 07:42:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 233. [2021-11-20 07:42:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 137 states have (on average 1.167883211678832) internal successors, (160), 138 states have internal predecessors, (160), 81 states have call successors, (81), 14 states have call predecessors, (81), 14 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-11-20 07:42:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 321 transitions. [2021-11-20 07:42:10,991 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 321 transitions. Word has length 112 [2021-11-20 07:42:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 321 transitions. [2021-11-20 07:42:10,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 07:42:10,992 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 321 transitions. [2021-11-20 07:42:10,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-20 07:42:10,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:10,995 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:11,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:11,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:42:11,211 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash 387872868, now seen corresponding path program 3 times [2021-11-20 07:42:11,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:11,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570252558] [2021-11-20 07:42:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:11,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:11,219 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:42:11,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646377029] [2021-11-20 07:42:11,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:42:11,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:11,226 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:11,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:42:11,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:42:11,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:11,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-20 07:42:11,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-20 07:42:12,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-11-20 07:42:13,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:13,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570252558] [2021-11-20 07:42:13,149 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:42:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646377029] [2021-11-20 07:42:13,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646377029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:13,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:13,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-11-20 07:42:13,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359516675] [2021-11-20 07:42:13,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:13,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:42:13,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:42:13,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:42:13,152 INFO L87 Difference]: Start difference. First operand 233 states and 321 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-20 07:42:16,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:16,418 INFO L93 Difference]: Finished difference Result 382 states and 540 transitions. [2021-11-20 07:42:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:42:16,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 115 [2021-11-20 07:42:16,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:16,422 INFO L225 Difference]: With dead ends: 382 [2021-11-20 07:42:16,422 INFO L226 Difference]: Without dead ends: 380 [2021-11-20 07:42:16,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=309, Invalid=1251, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:42:16,424 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 140 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:16,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 357 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-20 07:42:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-20 07:42:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 257. [2021-11-20 07:42:16,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 160 states have internal predecessors, (182), 82 states have call successors, (82), 16 states have call predecessors, (82), 16 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-20 07:42:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2021-11-20 07:42:16,548 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 115 [2021-11-20 07:42:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:16,549 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2021-11-20 07:42:16,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 7 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2021-11-20 07:42:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2021-11-20 07:42:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-20 07:42:16,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:16,555 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:16,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:16,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:16,769 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:16,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:16,769 INFO L85 PathProgramCache]: Analyzing trace with hash 965525295, now seen corresponding path program 4 times [2021-11-20 07:42:16,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:16,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111639555] [2021-11-20 07:42:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:16,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:16,779 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:42:16,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980515548] [2021-11-20 07:42:16,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:42:16,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:16,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:16,784 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:16,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:42:16,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:42:16,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:42:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 139 proven. 28 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-20 07:42:17,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-11-20 07:42:17,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111639555] [2021-11-20 07:42:17,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:42:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980515548] [2021-11-20 07:42:17,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980515548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:17,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:42:17,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-11-20 07:42:17,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633958207] [2021-11-20 07:42:17,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:17,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:42:17,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:17,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:42:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:42:17,794 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-20 07:42:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:18,348 INFO L93 Difference]: Finished difference Result 320 states and 416 transitions. [2021-11-20 07:42:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 07:42:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 117 [2021-11-20 07:42:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:18,353 INFO L225 Difference]: With dead ends: 320 [2021-11-20 07:42:18,353 INFO L226 Difference]: Without dead ends: 136 [2021-11-20 07:42:18,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:42:18,355 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 48 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:18,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 467 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:42:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-20 07:42:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-11-20 07:42:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-20 07:42:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2021-11-20 07:42:18,415 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 117 [2021-11-20 07:42:18,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:18,416 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2021-11-20 07:42:18,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-11-20 07:42:18,416 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2021-11-20 07:42:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-20 07:42:18,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:18,419 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:18,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:18,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:18,641 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:18,641 INFO L85 PathProgramCache]: Analyzing trace with hash -451913227, now seen corresponding path program 5 times [2021-11-20 07:42:18,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:18,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404798010] [2021-11-20 07:42:18,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:18,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:18,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:42:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102259366] [2021-11-20 07:42:18,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:42:18,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:18,652 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:18,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:42:18,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-20 07:42:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 07:42:18,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 95 proven. 28 refuted. 0 times theorem prover too weak. 503 trivial. 0 not checked. [2021-11-20 07:42:19,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:27,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:27,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404798010] [2021-11-20 07:42:27,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:42:27,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102259366] [2021-11-20 07:42:27,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102259366] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:27,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:42:27,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-20 07:42:27,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810160426] [2021-11-20 07:42:27,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:27,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:42:27,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:27,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:42:27,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=469, Unknown=1, NotChecked=0, Total=600 [2021-11-20 07:42:27,597 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 07:42:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:28,188 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-11-20 07:42:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:42:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 142 [2021-11-20 07:42:28,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:28,189 INFO L225 Difference]: With dead ends: 151 [2021-11-20 07:42:28,189 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 07:42:28,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=324, Invalid=1081, Unknown=1, NotChecked=0, Total=1406 [2021-11-20 07:42:28,191 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:28,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 341 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:42:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 07:42:28,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 07:42:28,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:28,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 07:42:28,192 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2021-11-20 07:42:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:28,193 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 07:42:28,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-20 07:42:28,193 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 07:42:28,193 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 07:42:28,198 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:42:28,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:28,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:42:28,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 07:42:37,543 WARN L227 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 193 DAG size of output: 89 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:42:42,674 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 198 DAG size of output: 77 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:42:52,142 WARN L227 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 195 DAG size of output: 88 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:42:57,772 WARN L227 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 198 DAG size of output: 77 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:43:57,642 WARN L227 SmtUtils]: Spent 58.61s on a formula simplification. DAG size of input: 209 DAG size of output: 100 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:44:18,415 WARN L227 SmtUtils]: Spent 20.77s on a formula simplification. DAG size of input: 152 DAG size of output: 81 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:44:24,625 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 193 DAG size of output: 89 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 07:44:24,632 INFO L854 garLoopResultBuilder]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse4 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse12 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse2 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse6 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse8 (= |ULTIMATE.start_main_~a~0#1| .cse12)) (.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse10 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse3 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse5 (or (= |ULTIMATE.start_main_~c~0#1| 0) .cse4 (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) .cse12))) (.cse9 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse7 (<= |ULTIMATE.start_main_~x~0#1| 2))) (or (and (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0) .cse6 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) (<= |ULTIMATE.start_main_~c~0#1| (+ 2 (div (+ |ULTIMATE.start_main_~b~0#1| (- 4)) 2))) .cse7 .cse8) (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~a~0#1| 2) (<= 1 |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~q~0#1| 1) (= |ULTIMATE.start_main_~s~0#1| 0) .cse3 (<= |ULTIMATE.start_main_~c~0#1| 2) (= |ULTIMATE.start_main_~r~0#1| 1) .cse9 .cse8) (and (= |ULTIMATE.start_main_~b~0#1| (+ .cse10 .cse11)) (<= |ULTIMATE.start_main_~b~0#1| 2) (<= 1 |ULTIMATE.start_main_~b~0#1|) .cse2 (= |ULTIMATE.start_main_~q~0#1| 0) .cse3 .cse6 .cse7 .cse8 (= |ULTIMATE.start_main_~s~0#1| 1)) (and (<= 0 |ULTIMATE.start_main_~b~0#1|) .cse0 .cse1 (= (+ .cse10 .cse11 |ULTIMATE.start_main_~a~0#1|) .cse12) (<= 0 |ULTIMATE.start_main_~c~0#1|) .cse3 (< |ULTIMATE.start_main_~c~0#1| (div (+ (* |ULTIMATE.start_main_~c~0#1| (- 1)) 2) 2)) .cse5 .cse9 .cse7 (< |ULTIMATE.start_main_~b~0#1| (div (+ 2 (* |ULTIMATE.start_main_~b~0#1| (- 1))) 2)))))) [2021-11-20 07:44:24,632 INFO L854 garLoopResultBuilder]: At program point L35-3(lines 35 73) the Hoare annotation is: (let ((.cse0 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (and (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 1 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| 0) (= (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|) |ULTIMATE.start_main_~a~0#1|) .cse0) (<= 1 |ULTIMATE.start_main_~x~0#1|) (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|) (or (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) (= (+ (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) .cse0)) (<= |ULTIMATE.start_main_~x~0#1| 2))) [2021-11-20 07:44:24,632 INFO L854 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse25 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse26 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse27 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse28 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse4 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse6 (= |ULTIMATE.start_main_~s~0#1| 0)) (.cse8 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse15 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse23 (= (* 2 |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse20 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse19 (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1)) (.cse2 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|)) (.cse21 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0)) (.cse22 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|))) (.cse9 (< |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse11 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse12 (= |ULTIMATE.start_main_~b~0#1| (+ .cse27 .cse28))) (.cse13 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse14 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse5 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse16 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse17 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse10 (= |ULTIMATE.start_main_~a~0#1| (+ .cse25 .cse26))) (.cse18 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 .cse2 (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) .cse3 .cse4 .cse5 .cse6 .cse7 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse8 .cse9 .cse10) (and .cse0 .cse11 .cse1 .cse2 .cse12 .cse13 .cse14 .cse5 .cse7 .cse15 (<= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse16 .cse17 .cse10 .cse18) (and .cse19 .cse0 .cse11 .cse1 .cse2 .cse13 .cse5 (<= |ULTIMATE.start_main_~v~0#1| (* 4 |ULTIMATE.start_main_~b~0#1|)) .cse20 .cse21 .cse16 .cse22 .cse17 .cse10) (and .cse0 .cse1 .cse12 .cse4 .cse5 .cse6 .cse7 .cse8 .cse23 .cse20 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~y~0#1|) (= 2 |ULTIMATE.start_main_~d~0#1|) .cse10) (and .cse11 .cse1 .cse2 .cse3 .cse12 .cse13 .cse14 .cse5 .cse7 .cse15 .cse16 .cse17 .cse10 .cse18) (and .cse19 .cse0 .cse11 .cse1 .cse2 .cse13 .cse5 .cse23 .cse20 .cse21 .cse16 .cse22 .cse17 .cse10) (and .cse19 .cse0 .cse11 .cse1 .cse2 .cse3 .cse13 .cse5 .cse21 .cse16 .cse22 .cse9 .cse17 .cse10) (let ((.cse24 (div |ULTIMATE.start_main_~v~0#1| 2))) (and (= (mod |ULTIMATE.start_main_~v~0#1| 2) 0) .cse0 .cse11 .cse1 .cse12 (<= |ULTIMATE.start_main_~b~0#1| .cse24) .cse13 .cse14 .cse5 .cse7 (<= (* 2 .cse24) |ULTIMATE.start_main_~c~0#1|) .cse16 (= (+ |ULTIMATE.start_main_~b~0#1| .cse25 .cse26) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|) .cse27 .cse28 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~d~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse17 .cse10 .cse18))))) [2021-11-20 07:44:24,632 INFO L858 garLoopResultBuilder]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-11-20 07:44:24,633 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 07:44:24,633 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 07:44:24,633 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 07:44:24,633 INFO L854 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-11-20 07:44:24,633 INFO L854 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-11-20 07:44:24,633 INFO L858 garLoopResultBuilder]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-11-20 07:44:24,634 INFO L854 garLoopResultBuilder]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse22 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse19 (= (* 2 |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse10 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse8 (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1)) (.cse9 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse11 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0)) (.cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse12 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|))) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse2 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse13 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse20 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|)) (.cse14 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse15 (= |ULTIMATE.start_main_~s~0#1| 0)) (.cse16 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse17 (<= |ULTIMATE.start_main_~c~0#1| 2)) (.cse18 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse21 (< |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| .cse22))) (or (and .cse0 .cse1 .cse2 (<= |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) .cse3 (= |ULTIMATE.start_main_~q~0#1| 0) .cse4 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 (= |ULTIMATE.start_main_~s~0#1| 1)) (and .cse8 .cse9 .cse0 .cse1 .cse2 .cse3 .cse4 (<= |ULTIMATE.start_main_~v~0#1| (* 4 |ULTIMATE.start_main_~b~0#1|)) .cse10 .cse11 .cse5 .cse12 .cse6 .cse7) (and .cse9 .cse1 (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) .cse13 .cse14 .cse4 .cse15 .cse16 .cse17 .cse18 .cse19 .cse10 (= 2 |ULTIMATE.start_main_~d~0#1|) .cse7) (and .cse8 .cse9 .cse0 .cse1 .cse2 .cse3 .cse4 .cse19 .cse10 .cse11 .cse5 .cse12 .cse6 .cse7) (and .cse8 .cse9 .cse0 .cse1 .cse2 .cse20 .cse3 .cse4 .cse11 .cse5 .cse12 .cse21 .cse6 .cse7) (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse2 .cse13 .cse20 (= .cse22 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse14 .cse4 .cse15 .cse16 .cse17 .cse18 .cse21 .cse7)))) [2021-11-20 07:44:24,634 INFO L858 garLoopResultBuilder]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-11-20 07:44:24,634 INFO L858 garLoopResultBuilder]: For program point L74(line 74) no Hoare annotation was computed. [2021-11-20 07:44:24,634 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 07:44:24,634 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~y~0#1| 2) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 1 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2)) [2021-11-20 07:44:24,634 INFO L854 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse22 (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)))) (let ((.cse19 (= (* 2 |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse10 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse8 (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1)) (.cse9 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse0 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse11 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0)) (.cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse12 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|))) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse2 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse13 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse20 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|)) (.cse14 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse15 (= |ULTIMATE.start_main_~s~0#1| 0)) (.cse16 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse17 (<= |ULTIMATE.start_main_~c~0#1| 2)) (.cse18 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse21 (< |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| .cse22))) (or (and .cse0 .cse1 .cse2 (<= |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) .cse3 (= |ULTIMATE.start_main_~q~0#1| 0) .cse4 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|) .cse5 .cse6 .cse7 (= |ULTIMATE.start_main_~s~0#1| 1)) (and .cse8 .cse9 .cse0 .cse1 .cse2 .cse3 .cse4 (<= |ULTIMATE.start_main_~v~0#1| (* 4 |ULTIMATE.start_main_~b~0#1|)) .cse10 .cse11 .cse5 .cse12 .cse6 .cse7) (and .cse9 .cse1 (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) .cse13 .cse14 .cse4 .cse15 .cse16 .cse17 .cse18 .cse19 .cse10 (= 2 |ULTIMATE.start_main_~d~0#1|) .cse7) (and .cse8 .cse9 .cse0 .cse1 .cse2 .cse3 .cse4 .cse19 .cse10 .cse11 .cse5 .cse12 .cse6 .cse7) (and .cse8 .cse9 .cse0 .cse1 .cse2 .cse20 .cse3 .cse4 .cse11 .cse5 .cse12 .cse21 .cse6 .cse7) (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) .cse2 .cse13 .cse20 (= .cse22 (+ |ULTIMATE.start_main_~c~0#1| (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse14 .cse4 .cse15 .cse16 .cse17 .cse18 .cse21 .cse7)))) [2021-11-20 07:44:24,634 INFO L854 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse28 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse29 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse30 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse31 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse3 (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse4 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse6 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse8 (= |ULTIMATE.start_main_~s~0#1| 0)) (.cse10 (<= |ULTIMATE.start_main_~c~0#1| 2)) (.cse11 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse18 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse26 (= (* 2 |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse23 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse22 (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1)) (.cse2 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse5 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|)) (.cse24 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0)) (.cse25 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|))) (.cse12 (< |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse14 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse15 (= |ULTIMATE.start_main_~b~0#1| (+ .cse30 .cse31))) (.cse16 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse17 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse7 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse9 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse19 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse20 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse13 (= |ULTIMATE.start_main_~a~0#1| (+ .cse28 .cse29))) (.cse21 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13) (and .cse0 .cse14 .cse1 .cse2 .cse15 .cse16 .cse17 .cse7 .cse9 .cse18 (<= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse19 .cse20 .cse13 .cse21) (and .cse22 .cse0 .cse14 .cse1 .cse2 .cse16 .cse7 (<= |ULTIMATE.start_main_~v~0#1| (* 4 |ULTIMATE.start_main_~b~0#1|)) .cse23 .cse24 .cse19 .cse25 .cse20 .cse13) (and .cse0 .cse1 .cse3 .cse4 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse26 .cse23 (= 2 |ULTIMATE.start_main_~d~0#1|) .cse13) (and .cse14 .cse1 .cse2 .cse5 .cse15 .cse16 .cse17 .cse7 .cse9 .cse18 .cse19 .cse20 .cse13 .cse21) (and .cse22 .cse0 .cse14 .cse1 .cse2 .cse16 .cse7 .cse26 .cse23 .cse24 .cse19 .cse25 .cse20 .cse13) (and .cse22 .cse0 .cse14 .cse1 .cse2 .cse5 .cse16 .cse7 .cse24 .cse19 .cse25 .cse12 .cse20 .cse13) (let ((.cse27 (div |ULTIMATE.start_main_~v~0#1| 2))) (and (= (mod |ULTIMATE.start_main_~v~0#1| 2) 0) .cse0 .cse14 .cse1 .cse15 (<= |ULTIMATE.start_main_~b~0#1| .cse27) .cse16 .cse17 .cse7 .cse9 (<= (* 2 .cse27) |ULTIMATE.start_main_~c~0#1|) .cse19 (= (+ |ULTIMATE.start_main_~b~0#1| .cse28 .cse29) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|) .cse30 .cse31 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~d~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse20 .cse13 .cse21))))) [2021-11-20 07:44:24,634 INFO L861 garLoopResultBuilder]: At program point L75(lines 18 76) the Hoare annotation is: true [2021-11-20 07:44:24,635 INFO L854 garLoopResultBuilder]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse20 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse21 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|))) (let ((.cse17 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse18 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse19 (+ .cse20 .cse21)) (.cse22 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|)) (.cse23 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) (let ((.cse2 (= .cse19 (+ |ULTIMATE.start_main_~c~0#1| .cse22 .cse23))) (.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse15 (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse10 (* 2 |ULTIMATE.start_main_~b~0#1|)) (.cse9 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse16 (or (= (+ |ULTIMATE.start_main_~b~0#1| .cse20 .cse21) (+ .cse17 .cse18 .cse22 .cse23)) (not (= |ULTIMATE.start_main_~c~0#1| 0)))) (.cse11 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse12 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse3 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse13 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse4 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse8 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse5 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse6 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse7 (= |ULTIMATE.start_main_~a~0#1| .cse19)) (.cse14 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and (not (= |ULTIMATE.start_main_~b~0#1| 0)) (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1) .cse0 .cse1 (<= 1 |ULTIMATE.start_main_~c~0#1|) .cse2 .cse3 .cse4 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0) .cse5 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|)) .cse6 .cse7) (and (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) .cse2 (= |ULTIMATE.start_main_~q~0#1| 1) .cse4 (= |ULTIMATE.start_main_~s~0#1| 0) .cse8 (<= |ULTIMATE.start_main_~c~0#1| 2) (= |ULTIMATE.start_main_~r~0#1| 1) .cse9 .cse7) (and (= |ULTIMATE.start_main_~k~0#1| 1) (< |ULTIMATE.start_main_~x~0#1| .cse10) .cse11 .cse12 .cse3 .cse13 .cse5 .cse6 .cse7 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) .cse14 (= .cse15 |ULTIMATE.start_main_~x~0#1|)) (and .cse16 .cse0 .cse1 (<= |ULTIMATE.start_main_~a~0#1| 2) .cse11 (< 0 .cse15) .cse8 (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~b~0#1|) (= .cse10 |ULTIMATE.start_main_~v~0#1|) .cse9 .cse6 .cse7) (and (<= (div (* |ULTIMATE.start_main_~v~0#1| (- 1)) (- 2)) |ULTIMATE.start_main_~b~0#1|) .cse16 .cse1 .cse11 .cse12 (<= 0 |ULTIMATE.start_main_~c~0#1|) .cse3 .cse13 .cse8 .cse5 (< (* 2 |ULTIMATE.start_main_~c~0#1|) 2) .cse6 .cse7 .cse14) (and .cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~c~0#1|) (= |ULTIMATE.start_main_~b~0#1| (+ .cse17 .cse18)) (<= |ULTIMATE.start_main_~b~0#1| 2) .cse3 .cse13 .cse4 .cse8 .cse5 .cse6 .cse7 .cse14))))) [2021-11-20 07:44:24,635 INFO L858 garLoopResultBuilder]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-11-20 07:44:24,635 INFO L858 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2021-11-20 07:44:24,635 INFO L861 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2021-11-20 07:44:24,635 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-11-20 07:44:24,635 INFO L854 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse25 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~p~0#1|)) (.cse26 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~r~0#1|)) (.cse27 (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1|)) (.cse28 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1|))) (let ((.cse4 (= |ULTIMATE.start_main_~q~0#1| 1)) (.cse6 (= |ULTIMATE.start_main_~s~0#1| 0)) (.cse8 (= |ULTIMATE.start_main_~r~0#1| 1)) (.cse15 (<= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse23 (= (* 2 |ULTIMATE.start_main_~b~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse20 (< |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~a~0#1|)) (.cse19 (= (+ |ULTIMATE.start_main_~s~0#1| (* 2 |ULTIMATE.start_main_~r~0#1|)) 1)) (.cse2 (= (* |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~d~0#1|) |ULTIMATE.start_main_~v~0#1|)) (.cse3 (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|)) (.cse21 (= (+ |ULTIMATE.start_main_~q~0#1| (* 2 |ULTIMATE.start_main_~p~0#1|)) 0)) (.cse22 (= |ULTIMATE.start_main_~y~0#1| (+ (* 2 |ULTIMATE.start_main_~x~0#1|) |ULTIMATE.start_main_~b~0#1|))) (.cse9 (< |ULTIMATE.start_main_~v~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse0 (<= |ULTIMATE.start_main_~y~0#1| 2)) (.cse11 (<= 1 |ULTIMATE.start_main_~y~0#1|)) (.cse1 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~c~0#1|)) (.cse12 (= |ULTIMATE.start_main_~b~0#1| (+ .cse27 .cse28))) (.cse13 (= |ULTIMATE.start_main_~r~0#1| 0)) (.cse14 (= |ULTIMATE.start_main_~q~0#1| 0)) (.cse5 (= |ULTIMATE.start_main_~k~0#1| 0)) (.cse7 (<= 1 |ULTIMATE.start_main_~x~0#1|)) (.cse16 (= |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse17 (<= |ULTIMATE.start_main_~x~0#1| 2)) (.cse10 (= |ULTIMATE.start_main_~a~0#1| (+ .cse25 .cse26))) (.cse18 (= |ULTIMATE.start_main_~s~0#1| 1))) (or (and .cse0 .cse1 .cse2 (< |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~x~0#1|) .cse3 .cse4 .cse5 .cse6 .cse7 (<= |ULTIMATE.start_main_~c~0#1| 2) .cse8 .cse9 .cse10) (and .cse0 .cse11 .cse1 .cse2 .cse12 .cse13 .cse14 .cse5 .cse7 .cse15 (<= (+ |ULTIMATE.start_main_~b~0#1| |ULTIMATE.start_main_~v~0#1|) |ULTIMATE.start_main_~c~0#1|) .cse16 .cse17 .cse10 .cse18) (and .cse19 .cse0 .cse11 .cse1 .cse2 .cse13 .cse5 (<= |ULTIMATE.start_main_~v~0#1| (* 4 |ULTIMATE.start_main_~b~0#1|)) .cse20 .cse21 .cse16 .cse22 .cse17 .cse10) (and .cse0 .cse1 .cse12 .cse4 .cse5 .cse6 .cse7 .cse8 .cse23 .cse20 (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~y~0#1|) (= 2 |ULTIMATE.start_main_~d~0#1|) .cse10) (and .cse11 .cse1 .cse2 .cse3 .cse12 .cse13 .cse14 .cse5 .cse7 .cse15 .cse16 .cse17 .cse10 .cse18) (and .cse19 .cse0 .cse11 .cse1 .cse2 .cse13 .cse5 .cse23 .cse20 .cse21 .cse16 .cse22 .cse17 .cse10) (and .cse19 .cse0 .cse11 .cse1 .cse2 .cse3 .cse13 .cse5 .cse21 .cse16 .cse22 .cse9 .cse17 .cse10) (let ((.cse24 (div |ULTIMATE.start_main_~v~0#1| 2))) (and (= (mod |ULTIMATE.start_main_~v~0#1| 2) 0) .cse0 .cse11 .cse1 .cse12 (<= |ULTIMATE.start_main_~b~0#1| .cse24) .cse13 .cse14 .cse5 .cse7 (<= (* 2 .cse24) |ULTIMATE.start_main_~c~0#1|) .cse16 (= (+ |ULTIMATE.start_main_~b~0#1| .cse25 .cse26) (+ (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~q~0#1| |ULTIMATE.start_main_~d~0#1|) .cse27 .cse28 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~s~0#1|) (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~s~0#1| |ULTIMATE.start_main_~d~0#1|) (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~q~0#1|))) .cse17 .cse10 .cse18))))) [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-11-20 07:44:24,636 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-11-20 07:44:24,639 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:44:24,640 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:44:24,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:44:24 BoogieIcfgContainer [2021-11-20 07:44:24,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:44:24,679 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:44:24,679 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:44:24,679 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:44:24,680 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:40:11" (3/4) ... [2021-11-20 07:44:24,683 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 07:44:24,689 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2021-11-20 07:44:24,690 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 07:44:24,694 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-20 07:44:24,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 07:44:24,695 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 07:44:24,696 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 07:44:24,745 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:44:24,745 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:44:24,746 INFO L158 Benchmark]: Toolchain (without parser) took 254118.65ms. Allocated memory was 92.3MB in the beginning and 144.7MB in the end (delta: 52.4MB). Free memory was 53.5MB in the beginning and 86.1MB in the end (delta: -32.5MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,746 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:44:24,747 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.52ms. Allocated memory is still 92.3MB. Free memory was 53.3MB in the beginning and 67.1MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,747 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.89ms. Allocated memory is still 92.3MB. Free memory was 67.1MB in the beginning and 65.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,747 INFO L158 Benchmark]: Boogie Preprocessor took 25.79ms. Allocated memory is still 92.3MB. Free memory was 65.6MB in the beginning and 64.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,748 INFO L158 Benchmark]: RCFGBuilder took 317.83ms. Allocated memory is still 92.3MB. Free memory was 64.3MB in the beginning and 54.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,748 INFO L158 Benchmark]: TraceAbstraction took 253336.82ms. Allocated memory was 92.3MB in the beginning and 144.7MB in the end (delta: 52.4MB). Free memory was 53.5MB in the beginning and 90.2MB in the end (delta: -36.8MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,748 INFO L158 Benchmark]: Witness Printer took 66.34ms. Allocated memory is still 144.7MB. Free memory was 90.2MB in the beginning and 86.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:44:24,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 92.3MB. Free memory is still 69.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.52ms. Allocated memory is still 92.3MB. Free memory was 53.3MB in the beginning and 67.1MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.89ms. Allocated memory is still 92.3MB. Free memory was 67.1MB in the beginning and 65.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.79ms. Allocated memory is still 92.3MB. Free memory was 65.6MB in the beginning and 64.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 317.83ms. Allocated memory is still 92.3MB. Free memory was 64.3MB in the beginning and 54.2MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 253336.82ms. Allocated memory was 92.3MB in the beginning and 144.7MB in the end (delta: 52.4MB). Free memory was 53.5MB in the beginning and 90.2MB in the end (delta: -36.8MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. * Witness Printer took 66.34ms. Allocated memory is still 144.7MB. Free memory was 90.2MB in the beginning and 86.1MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 253.2s, OverallIterations: 21, TraceHistogramMax: 17, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.1s, AutomataDifference: 100.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 116.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 1351 SdHoareTripleChecker+Valid, 61.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1316 mSDsluCounter, 6195 SdHoareTripleChecker+Invalid, 60.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 63 IncrementalHoareTripleChecker+Unchecked, 5225 mSDsCounter, 1894 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5561 IncrementalHoareTripleChecker+Invalid, 7531 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1894 mSolverCounterUnsat, 970 mSDtfsCounter, 5561 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2670 GetRequests, 2178 SyntacticMatches, 16 SemanticMatches, 476 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4367 ImplicationChecksByTransitivity, 51.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=16, InterpolantAutomatonStates: 319, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 435 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 343 PreInvPairs, 411 NumberOfFragments, 3000 HoareAnnotationTreeSize, 343 FomulaSimplifications, 15831 FormulaSimplificationTreeSizeReduction, 1.6s HoareSimplificationTime, 15 FomulaSimplificationsInter, 22231 FormulaSimplificationTreeSizeReductionInter, 114.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 29.1s InterpolantComputationTime, 1386 NumberOfCodeBlocks, 1315 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2290 ConstructedInterpolants, 13 QuantifiedInterpolants, 10990 SizeOfPredicates, 120 NumberOfNonLiveVariables, 3419 ConjunctsInSsa, 453 ConjunctsInUnsatCore, 35 InterpolantComputations, 8 PerfectInterpolantSequences, 4437/4858 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((((((((((!(b == 0) && s + 2 * r == 1) && y <= 2) && 1 <= y) && 1 <= c) && x * p + y * r == c + y * k * s + x * k * q) && r == 0) && k == 0) && q + 2 * p == 0) && a == x) && y == 2 * x + b) && x <= 2) && a == x * p + y * r) || ((((((((((a == y && b == x) && x * p + y * r == c + y * k * s + x * k * q) && q == 1) && k == 0) && s == 0) && 1 <= x) && c <= 2) && r == 1) && b < a) && a == x * p + y * r)) || (((((((((((k == 1 && x < 2 * b) && b * d == v) && b == y) && r == 0) && q == 0) && a == x) && x <= 2) && a == x * p + y * r) && b <= x) && s == 1) && b + c == x)) || ((((((((((((b + x * p + y * r == x * q + y * s + y * k * s + x * k * q || !(c == 0)) && y <= 2) && 1 <= y) && a <= 2) && b * d == v) && 0 < b + c) && 1 <= x) && c < b) && 2 * b == v) && b < a) && x <= 2) && a == x * p + y * r)) || (((((((((((((v * -1 / -2 <= b && (b + x * p + y * r == x * q + y * s + y * k * s + x * k * q || !(c == 0))) && 1 <= y) && b * d == v) && b == y) && 0 <= c) && r == 0) && q == 0) && 1 <= x) && a == x) && 2 * c < 2) && x <= 2) && a == x * p + y * r) && s == 1)) || (((((((((((1 <= y && a == c) && b == x * q + y * s) && b <= 2) && r == 0) && q == 0) && k == 0) && 1 <= x) && a == x) && x <= 2) && a == x * p + y * r) && s == 1) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: ((((((((((((((((1 <= y && a == c) && b * d == v) && v <= c) && b == x * q + y * s) && r == 0) && q == 0) && k == 0) && b <= c) && a == x) && x <= 2) && a == x * p + y * r) && s == 1) || (((((((((((((s + 2 * r == 1 && y <= 2) && 1 <= y) && a == c) && b * d == v) && r == 0) && k == 0) && v <= 4 * b) && b < a) && q + 2 * p == 0) && a == x) && y == 2 * x + b) && x <= 2) && a == x * p + y * r)) || (((((((((((((y <= 2 && a == c) && x < y) && b == x) && q == 1) && k == 0) && s == 0) && 1 <= x) && c <= 2) && r == 1) && 2 * b == v) && b < a) && 2 == d) && a == x * p + y * r)) || (((((((((((((s + 2 * r == 1 && y <= 2) && 1 <= y) && a == c) && b * d == v) && r == 0) && k == 0) && 2 * b == v) && b < a) && q + 2 * p == 0) && a == x) && y == 2 * x + b) && x <= 2) && a == x * p + y * r)) || (((((((((((((s + 2 * r == 1 && y <= 2) && 1 <= y) && a == c) && b * d == v) && b == v) && r == 0) && k == 0) && q + 2 * p == 0) && a == x) && y == 2 * x + b) && v < c) && x <= 2) && a == x * p + y * r)) || ((((((((((((a == y && b * d == v) && b == x) && b == v) && x * p + y * r == c + y * k * s + x * k * q) && q == 1) && k == 0) && s == 0) && 1 <= x) && c <= 2) && r == 1) && v < c) && a == x * p + y * r) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((((((s + 2 * r == 1 && y <= 2) && 1 <= y) && r == 0) && 1 <= x) && b <= c) && ((c == 0 || b <= c) || k * x * q + c + y * k * s == x * p + y * r)) && q + 2 * p == 0) && a == x) && y == 2 * x + b) && c <= 2 + (b + -4) / 2) && x <= 2) && a == x * p + y * r) || ((((((((((a == y && a <= 2) && 1 <= c) && b == x) && q == 1) && s == 0) && 1 <= x) && c <= 2) && r == 1) && b < a) && a == x * p + y * r)) || (((((((((b == x * q + y * s && b <= 2) && 1 <= b) && r == 0) && q == 0) && 1 <= x) && a == x) && x <= 2) && a == x * p + y * r) && s == 1)) || ((((((((((0 <= b && y <= 2) && 1 <= y) && x * q + y * s + a == x * p + y * r) && 0 <= c) && 1 <= x) && c < (c * -1 + 2) / 2) && ((c == 0 || b <= c) || k * x * q + c + y * k * s == x * p + y * r)) && b < a) && x <= 2) && b < (2 + b * -1) / 2) RESULT: Ultimate proved your program to be correct! [2021-11-20 07:44:24,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ea5f15-b2e5-4d7d-9f20-4386fe5f96ba/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE