./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y --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 cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:00:19,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:00:19,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:00:19,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:00:19,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:00:19,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:00:19,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:00:19,223 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:00:19,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:00:19,227 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:00:19,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:00:19,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:00:19,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:00:19,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:00:19,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:00:19,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:00:19,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:00:19,238 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:00:19,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:00:19,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:00:19,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:00:19,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:00:19,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:00:19,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:00:19,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:00:19,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:00:19,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:00:19,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:00:19,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:00:19,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:00:19,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:00:19,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:00:19,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:00:19,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:00:19,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:00:19,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:00:19,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:00:19,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:00:19,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:00:19,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:00:19,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:00:19,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:00:19,315 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:00:19,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:00:19,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:00:19,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:00:19,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:00:19,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:00:19,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:00:19,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:00:19,329 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:00:19,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:00:19,330 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:00:19,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:00:19,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:00:19,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:00:19,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:00:19,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:00:19,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:00:19,331 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:00:19,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:00:19,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:00:19,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:00:19,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:00:19,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:00:19,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:00:19,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:00:19,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:00:19,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:00:19,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:00:19,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:00:19,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:00:19,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:00:19,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:00:19,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:00:19,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:00:19,336 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_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed [2021-11-13 18:00:19,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:00:19,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:00:19,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:00:19,666 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:00:19,669 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:00:19,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2021-11-13 18:00:19,767 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/7102bdbae/b9e8986aef284356aff656b697b9aaff/FLAGab2cb7cb3 [2021-11-13 18:00:20,170 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:00:20,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2021-11-13 18:00:20,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/7102bdbae/b9e8986aef284356aff656b697b9aaff/FLAGab2cb7cb3 [2021-11-13 18:00:20,580 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/7102bdbae/b9e8986aef284356aff656b697b9aaff [2021-11-13 18:00:20,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:00:20,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:00:20,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:00:20,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:00:20,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:00:20,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f9a0dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20, skipping insertion in model container [2021-11-13 18:00:20,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:00:20,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:00:20,773 WARN L228 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_27f4e316-21f0-4bbd-8880-a71c4feae115/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2021-11-13 18:00:20,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:00:20,827 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:00:20,846 WARN L228 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_27f4e316-21f0-4bbd-8880-a71c4feae115/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2021-11-13 18:00:20,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:00:20,887 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:00:20,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20 WrapperNode [2021-11-13 18:00:20,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:00:20,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:00:20,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:00:20,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:00:20,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,920 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:00:20,939 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:00:20,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:00:20,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:00:20,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,970 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:00:20,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:00:20,972 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:00:20,972 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:00:20,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (1/1) ... [2021-11-13 18:00:20,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:00:20,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:21,013 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:00:21,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:00:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:00:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:00:21,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:00:21,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:00:21,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:00:21,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:00:21,254 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:00:21,254 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:00:21,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:00:21 BoogieIcfgContainer [2021-11-13 18:00:21,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:00:21,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:00:21,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:00:21,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:00:21,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:00:20" (1/3) ... [2021-11-13 18:00:21,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da86153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:00:21, skipping insertion in model container [2021-11-13 18:00:21,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:20" (2/3) ... [2021-11-13 18:00:21,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@da86153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:00:21, skipping insertion in model container [2021-11-13 18:00:21,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:00:21" (3/3) ... [2021-11-13 18:00:21,266 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound50.c [2021-11-13 18:00:21,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:00:21,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:00:21,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:00:21,326 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 [2021-11-13 18:00:21,327 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:00:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 18:00:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:00:21,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:21,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:21,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:21,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2021-11-13 18:00:21,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:21,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523280319] [2021-11-13 18:00:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:21,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:00:21,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:21,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523280319] [2021-11-13 18:00:21,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523280319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:21,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:21,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:00:21,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691650352] [2021-11-13 18:00:21,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:21,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:00:21,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:00:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:00:21,595 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:00:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:21,620 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2021-11-13 18:00:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:00:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-13 18:00:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:21,630 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:00:21,630 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 18:00:21,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:00:21,639 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:21,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.99ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:00:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 18:00:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-13 18:00:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:00:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-13 18:00:21,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-11-13 18:00:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:21,682 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-13 18:00:21,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:00:21,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-13 18:00:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:00:21,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:21,684 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:21,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:00:21,685 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:21,686 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2021-11-13 18:00:21,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:21,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014654688] [2021-11-13 18:00:21,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:21,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:21,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:00:21,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:21,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014654688] [2021-11-13 18:00:21,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014654688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:21,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:21,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:00:21,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293890965] [2021-11-13 18:00:21,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:21,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:00:21,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:21,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:00:21,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:00:21,805 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:00:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:21,831 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2021-11-13 18:00:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:00:21,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:00:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:21,833 INFO L225 Difference]: With dead ends: 36 [2021-11-13 18:00:21,833 INFO L226 Difference]: Without dead ends: 24 [2021-11-13 18:00:21,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:00:21,836 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:21,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 11.85ms Time] [2021-11-13 18:00:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-13 18:00:21,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-13 18:00:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:00:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2021-11-13 18:00:21,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2021-11-13 18:00:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:21,849 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2021-11-13 18:00:21,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:00:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2021-11-13 18:00:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:00:21,851 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:21,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:21,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:00:21,852 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:21,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:21,853 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2021-11-13 18:00:21,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:21,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098146458] [2021-11-13 18:00:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:21,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:00:22,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098146458] [2021-11-13 18:00:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098146458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:22,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:22,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:00:22,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510439087] [2021-11-13 18:00:22,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:22,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:00:22,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:00:22,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:00:22,027 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:00:22,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:22,105 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-11-13 18:00:22,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:00:22,106 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:00:22,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:22,107 INFO L225 Difference]: With dead ends: 30 [2021-11-13 18:00:22,107 INFO L226 Difference]: Without dead ends: 28 [2021-11-13 18:00:22,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:00:22,110 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.47ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:22,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 31 Unknown, 0 Unchecked, 3.47ms Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 48.70ms Time] [2021-11-13 18:00:22,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-13 18:00:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-13 18:00:22,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:00:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-11-13 18:00:22,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2021-11-13 18:00:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:22,139 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-11-13 18:00:22,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:00:22,140 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-11-13 18:00:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:00:22,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:22,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:22,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:00:22,144 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:22,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2021-11-13 18:00:22,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:22,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684446234] [2021-11-13 18:00:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:22,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:22,176 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:22,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130376642] [2021-11-13 18:00:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:22,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:22,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:22,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:22,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:00:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:00:22,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:00:22,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:00:22,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:22,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684446234] [2021-11-13 18:00:22,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:22,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130376642] [2021-11-13 18:00:22,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130376642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:22,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:22,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:00:22,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670362303] [2021-11-13 18:00:22,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:22,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:00:22,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:22,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:00:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:00:22,435 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:00:22,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:22,503 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2021-11-13 18:00:22,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:00:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-13 18:00:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:22,505 INFO L225 Difference]: With dead ends: 46 [2021-11-13 18:00:22,506 INFO L226 Difference]: Without dead ends: 44 [2021-11-13 18:00:22,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:00:22,508 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.10ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:22,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 3.10ms Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 43.31ms Time] [2021-11-13 18:00:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-13 18:00:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2021-11-13 18:00:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-13 18:00:22,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-11-13 18:00:22,531 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13 [2021-11-13 18:00:22,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:22,532 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-11-13 18:00:22,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 18:00:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-11-13 18:00:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:00:22,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:22,535 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:22,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:22,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:22,748 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2021-11-13 18:00:22,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:22,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769826107] [2021-11-13 18:00:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:22,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:22,776 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:22,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210672458] [2021-11-13 18:00:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:22,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:22,791 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:22,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:00:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:00:22,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:00:23,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:00:23,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:23,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769826107] [2021-11-13 18:00:23,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:23,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210672458] [2021-11-13 18:00:23,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210672458] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:23,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:23,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:00:23,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014204594] [2021-11-13 18:00:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:23,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:00:23,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:00:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:00:23,031 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:00:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:23,088 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2021-11-13 18:00:23,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:00:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-13 18:00:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:23,090 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:00:23,091 INFO L226 Difference]: Without dead ends: 48 [2021-11-13 18:00:23,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:00:23,092 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:23,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 36 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 35.88ms Time] [2021-11-13 18:00:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-13 18:00:23,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-11-13 18:00:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 18:00:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2021-11-13 18:00:23,111 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2021-11-13 18:00:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:23,112 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2021-11-13 18:00:23,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:00:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2021-11-13 18:00:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:00:23,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:23,117 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:23,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:23,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:23,333 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:23,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:23,333 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2021-11-13 18:00:23,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:23,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932751524] [2021-11-13 18:00:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:23,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:23,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:23,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425448194] [2021-11-13 18:00:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:23,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:23,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:23,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:23,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:00:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:23,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:00:23,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:00:23,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:00:23,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:23,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932751524] [2021-11-13 18:00:23,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:23,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425448194] [2021-11-13 18:00:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425448194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:23,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:23,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:00:23,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115863756] [2021-11-13 18:00:23,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:23,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:00:23,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:00:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:00:23,576 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:00:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:23,687 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2021-11-13 18:00:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:00:23,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-11-13 18:00:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:23,690 INFO L225 Difference]: With dead ends: 58 [2021-11-13 18:00:23,691 INFO L226 Difference]: Without dead ends: 46 [2021-11-13 18:00:23,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:00:23,695 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.20ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:23,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 47 Unknown, 0 Unchecked, 6.20ms Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 60.20ms Time] [2021-11-13 18:00:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-13 18:00:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-13 18:00:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-13 18:00:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-11-13 18:00:23,728 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23 [2021-11-13 18:00:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:23,729 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-11-13 18:00:23,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:00:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-11-13 18:00:23,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:00:23,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:23,731 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:23,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:23,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:23,941 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:23,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2021-11-13 18:00:23,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:23,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992456689] [2021-11-13 18:00:23,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:23,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:23,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:23,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631479659] [2021-11-13 18:00:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:23,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:23,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:23,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:00:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:24,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:00:24,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:00:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:00:24,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:24,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992456689] [2021-11-13 18:00:24,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:24,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631479659] [2021-11-13 18:00:24,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631479659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:24,295 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:24,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-13 18:00:24,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940495012] [2021-11-13 18:00:24,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:24,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:24,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:00:24,297 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:00:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:24,497 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2021-11-13 18:00:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:00:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2021-11-13 18:00:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:24,503 INFO L225 Difference]: With dead ends: 116 [2021-11-13 18:00:24,503 INFO L226 Difference]: Without dead ends: 100 [2021-11-13 18:00:24,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:00:24,508 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.99ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 130.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:24,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 6.99ms Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 130.35ms Time] [2021-11-13 18:00:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-13 18:00:24,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-11-13 18:00:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-13 18:00:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2021-11-13 18:00:24,555 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41 [2021-11-13 18:00:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:24,555 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2021-11-13 18:00:24,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:00:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2021-11-13 18:00:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:00:24,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:24,557 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:24,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:24,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:24,762 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:24,763 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2021-11-13 18:00:24,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:24,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999014040] [2021-11-13 18:00:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:24,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:24,774 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:24,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730770747] [2021-11-13 18:00:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:24,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:24,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:24,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:24,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:00:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:00:24,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:25,037 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:00:25,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:00:25,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:25,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999014040] [2021-11-13 18:00:25,190 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:25,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730770747] [2021-11-13 18:00:25,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730770747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:25,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-13 18:00:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484239526] [2021-11-13 18:00:25,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:25,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:00:25,193 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 18:00:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:25,594 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-11-13 18:00:25,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:00:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2021-11-13 18:00:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:25,597 INFO L225 Difference]: With dead ends: 114 [2021-11-13 18:00:25,597 INFO L226 Difference]: Without dead ends: 112 [2021-11-13 18:00:25,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:00:25,598 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 304.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:25,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 162 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 341.64ms Time] [2021-11-13 18:00:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-13 18:00:25,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-11-13 18:00:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-13 18:00:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2021-11-13 18:00:25,624 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41 [2021-11-13 18:00:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:25,625 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2021-11-13 18:00:25,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 18:00:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2021-11-13 18:00:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:00:25,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:25,627 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:25,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:25,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 18:00:25,853 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:25,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:25,853 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2021-11-13 18:00:25,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:25,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200170424] [2021-11-13 18:00:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:25,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:25,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:25,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937066044] [2021-11-13 18:00:25,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:00:25,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:25,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:25,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:25,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:00:25,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:00:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:00:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:00:26,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:00:26,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:26,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200170424] [2021-11-13 18:00:26,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:26,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937066044] [2021-11-13 18:00:26,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937066044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:26,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:26,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-13 18:00:26,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020714394] [2021-11-13 18:00:26,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:26,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:26,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:00:26,262 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:00:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:26,373 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2021-11-13 18:00:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:00:26,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2021-11-13 18:00:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:26,376 INFO L225 Difference]: With dead ends: 118 [2021-11-13 18:00:26,376 INFO L226 Difference]: Without dead ends: 116 [2021-11-13 18:00:26,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:00:26,377 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.83ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:26,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 2.83ms Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 81.97ms Time] [2021-11-13 18:00:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-13 18:00:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-13 18:00:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-13 18:00:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2021-11-13 18:00:26,399 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46 [2021-11-13 18:00:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:26,400 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2021-11-13 18:00:26,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:00:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2021-11-13 18:00:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:00:26,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:26,416 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:26,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:26,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:26,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times [2021-11-13 18:00:26,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:26,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910350194] [2021-11-13 18:00:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:26,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:26,645 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:26,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95993878] [2021-11-13 18:00:26,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:00:26,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:26,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:26,662 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:26,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:00:26,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:00:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 18:00:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-13 18:00:26,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-13 18:00:27,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:27,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910350194] [2021-11-13 18:00:27,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:27,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95993878] [2021-11-13 18:00:27,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95993878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:27,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:27,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-13 18:00:27,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086651906] [2021-11-13 18:00:27,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:27,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:27,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:00:27,281 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 18:00:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:27,625 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2021-11-13 18:00:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:00:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2021-11-13 18:00:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:27,627 INFO L225 Difference]: With dead ends: 142 [2021-11-13 18:00:27,627 INFO L226 Difference]: Without dead ends: 131 [2021-11-13 18:00:27,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:00:27,629 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 252.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:27,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 278.24ms Time] [2021-11-13 18:00:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-13 18:00:27,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-13 18:00:27,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:00:27,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2021-11-13 18:00:27,651 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51 [2021-11-13 18:00:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:27,651 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2021-11-13 18:00:27,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 18:00:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2021-11-13 18:00:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:00:27,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:27,655 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:27,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 18:00:27,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:00:27,869 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:27,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2021-11-13 18:00:27,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:27,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981682545] [2021-11-13 18:00:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:27,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:27,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:27,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843788532] [2021-11-13 18:00:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:27,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:27,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:27,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:00:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:27,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:00:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-13 18:00:28,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:28,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:28,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981682545] [2021-11-13 18:00:28,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:28,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843788532] [2021-11-13 18:00:28,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843788532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:00:28,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:00:28,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-13 18:00:28,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136327908] [2021-11-13 18:00:28,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:28,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:00:28,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:28,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:00:28,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:00:28,621 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-13 18:00:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:28,759 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2021-11-13 18:00:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:00:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 67 [2021-11-13 18:00:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:28,762 INFO L225 Difference]: With dead ends: 137 [2021-11-13 18:00:28,762 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 18:00:28,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:00:28,763 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.16ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:28,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 175 Invalid, 91 Unknown, 0 Unchecked, 2.16ms Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 97.39ms Time] [2021-11-13 18:00:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 18:00:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-13 18:00:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 84 states have internal predecessors, (88), 29 states have call successors, (29), 22 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 18:00:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2021-11-13 18:00:28,782 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 67 [2021-11-13 18:00:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:28,783 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2021-11-13 18:00:28,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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) [2021-11-13 18:00:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2021-11-13 18:00:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:00:28,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:28,785 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:28,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:29,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:00:29,001 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:29,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2021-11-13 18:00:29,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:29,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263291356] [2021-11-13 18:00:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:29,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:29,011 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:29,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531632126] [2021-11-13 18:00:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:29,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:29,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:29,013 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:29,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:00:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:00:29,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-13 18:00:29,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:29,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:29,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263291356] [2021-11-13 18:00:29,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:29,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531632126] [2021-11-13 18:00:29,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531632126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:00:29,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:00:29,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-13 18:00:29,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514080099] [2021-11-13 18:00:29,761 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:29,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:00:29,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:00:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:00:29,764 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:00:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:29,903 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-11-13 18:00:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:00:29,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 72 [2021-11-13 18:00:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:29,907 INFO L225 Difference]: With dead ends: 135 [2021-11-13 18:00:29,908 INFO L226 Difference]: Without dead ends: 124 [2021-11-13 18:00:29,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:00:29,910 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:29,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 205 Invalid, 71 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 89.89ms Time] [2021-11-13 18:00:29,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-13 18:00:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-13 18:00:29,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:00:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-11-13 18:00:29,933 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 72 [2021-11-13 18:00:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:29,934 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-11-13 18:00:29,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:00:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-11-13 18:00:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-13 18:00:29,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:29,939 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-13 18:00:29,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:30,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:00:30,165 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:30,165 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times [2021-11-13 18:00:30,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:30,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152412449] [2021-11-13 18:00:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:30,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:30,190 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:30,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135062513] [2021-11-13 18:00:30,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:00:30,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:30,202 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:30,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:00:32,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:00:32,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:32,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-13 18:00:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 81 proven. 69 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-13 18:00:32,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:33,160 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 97 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-13 18:00:33,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:33,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152412449] [2021-11-13 18:00:33,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:33,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135062513] [2021-11-13 18:00:33,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135062513] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:33,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:33,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 16 [2021-11-13 18:00:33,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581525891] [2021-11-13 18:00:33,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:33,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:00:33,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:00:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:00:33,163 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-13 18:00:33,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:33,405 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2021-11-13 18:00:33,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:00:33,406 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 74 [2021-11-13 18:00:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:33,407 INFO L225 Difference]: With dead ends: 134 [2021-11-13 18:00:33,408 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 18:00:33,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:00:33,409 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 197.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:33,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 125 Invalid, 119 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [30 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 197.25ms Time] [2021-11-13 18:00:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 18:00:33,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-11-13 18:00:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-13 18:00:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2021-11-13 18:00:33,425 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74 [2021-11-13 18:00:33,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:33,426 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2021-11-13 18:00:33,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 9 states have internal predecessors, (25), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-13 18:00:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2021-11-13 18:00:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 18:00:33,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:33,428 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:33,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:33,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:33,634 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2021-11-13 18:00:33,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:33,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457553360] [2021-11-13 18:00:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:33,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:33,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:33,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798838896] [2021-11-13 18:00:33,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:00:33,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:33,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:33,665 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:33,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:00:33,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:00:33,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:00:33,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-13 18:00:34,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:34,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:34,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457553360] [2021-11-13 18:00:34,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:34,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798838896] [2021-11-13 18:00:34,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798838896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:00:34,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:00:34,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-13 18:00:34,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036401447] [2021-11-13 18:00:34,610 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:34,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:34,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:34,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:34,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:00:34,612 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 18:00:34,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:34,806 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2021-11-13 18:00:34,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:00:34,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 95 [2021-11-13 18:00:34,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:34,808 INFO L225 Difference]: With dead ends: 134 [2021-11-13 18:00:34,808 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 18:00:34,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:00:34,809 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 119.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.86ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 141.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:34,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 240 Invalid, 158 Unknown, 0 Unchecked, 2.86ms Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 141.27ms Time] [2021-11-13 18:00:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 18:00:34,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-13 18:00:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:00:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2021-11-13 18:00:34,825 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95 [2021-11-13 18:00:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:34,826 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2021-11-13 18:00:34,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-13 18:00:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2021-11-13 18:00:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:00:34,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:34,828 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:34,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:35,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:35,043 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 2 times [2021-11-13 18:00:35,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:35,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749841068] [2021-11-13 18:00:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:35,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:35,061 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:35,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817026624] [2021-11-13 18:00:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:00:35,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:35,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:35,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:00:35,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:00:35,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:00:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-11-13 18:00:35,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:35,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:35,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749841068] [2021-11-13 18:00:35,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:35,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817026624] [2021-11-13 18:00:35,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817026624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:00:35,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:00:35,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-13 18:00:35,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864080752] [2021-11-13 18:00:35,941 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:35,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:35,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:35,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:00:35,950 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-13 18:00:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:36,125 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2021-11-13 18:00:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:00:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 100 [2021-11-13 18:00:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:36,127 INFO L225 Difference]: With dead ends: 138 [2021-11-13 18:00:36,127 INFO L226 Difference]: Without dead ends: 125 [2021-11-13 18:00:36,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:00:36,129 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:36,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 150 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 134.99ms Time] [2021-11-13 18:00:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-13 18:00:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-13 18:00:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-13 18:00:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2021-11-13 18:00:36,146 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100 [2021-11-13 18:00:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:36,149 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2021-11-13 18:00:36,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-13 18:00:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2021-11-13 18:00:36,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:00:36,152 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:36,152 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:36,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:36,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:00:36,378 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times [2021-11-13 18:00:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:36,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390408110] [2021-11-13 18:00:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:36,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:36,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:36,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86765616] [2021-11-13 18:00:36,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:00:36,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:36,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:36,392 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:00:37,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:00:37,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:37,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:00:37,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-11-13 18:00:37,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-11-13 18:00:38,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:38,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390408110] [2021-11-13 18:00:38,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:38,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86765616] [2021-11-13 18:00:38,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86765616] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:38,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:38,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-13 18:00:38,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451138770] [2021-11-13 18:00:38,412 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:38,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:00:38,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:38,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:00:38,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:00:38,413 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-13 18:00:40,729 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 [] [2021-11-13 18:00:40,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:40,764 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2021-11-13 18:00:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:00:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) Word has length 123 [2021-11-13 18:00:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:40,767 INFO L225 Difference]: With dead ends: 134 [2021-11-13 18:00:40,767 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 18:00:40,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:00:40,768 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2270.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2289.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:40,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 115 Invalid, 133 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [26 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 2289.42ms Time] [2021-11-13 18:00:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 18:00:40,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-13 18:00:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:00:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2021-11-13 18:00:40,785 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123 [2021-11-13 18:00:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2021-11-13 18:00:40,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-13 18:00:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2021-11-13 18:00:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-13 18:00:40,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:40,787 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:40,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:40,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:00:40,996 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2021-11-13 18:00:40,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:40,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027381856] [2021-11-13 18:00:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:40,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:41,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:41,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584822293] [2021-11-13 18:00:41,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:00:41,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:41,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:41,005 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:41,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:00:41,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:00:41,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:00:41,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-13 18:00:41,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2021-11-13 18:00:41,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:41,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027381856] [2021-11-13 18:00:41,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:41,724 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584822293] [2021-11-13 18:00:41,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584822293] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:00:41,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:00:41,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-13 18:00:41,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063205520] [2021-11-13 18:00:41,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:41,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:00:41,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:41,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:00:41,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:00:41,726 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2021-11-13 18:00:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:42,181 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2021-11-13 18:00:42,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:00:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2021-11-13 18:00:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:42,185 INFO L225 Difference]: With dead ends: 390 [2021-11-13 18:00:42,186 INFO L226 Difference]: Without dead ends: 365 [2021-11-13 18:00:42,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:00:42,189 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 147 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.04ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 309.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:42,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 341 Invalid, 356 Unknown, 0 Unchecked, 5.04ms Time], IncrementalHoareTripleChecker [111 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 309.32ms Time] [2021-11-13 18:00:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-13 18:00:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313. [2021-11-13 18:00:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 196 states have (on average 1.0459183673469388) internal successors, (205), 203 states have internal predecessors, (205), 63 states have call successors, (63), 54 states have call predecessors, (63), 53 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-11-13 18:00:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 329 transitions. [2021-11-13 18:00:42,234 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 329 transitions. Word has length 125 [2021-11-13 18:00:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:42,234 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 329 transitions. [2021-11-13 18:00:42,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2021-11-13 18:00:42,235 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 329 transitions. [2021-11-13 18:00:42,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:00:42,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:42,236 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:42,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:42,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:00:42,458 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:42,458 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 3 times [2021-11-13 18:00:42,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:42,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747817900] [2021-11-13 18:00:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:42,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:42,466 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:42,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568913227] [2021-11-13 18:00:42,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:00:42,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:42,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:42,473 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:42,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:00:42,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 18:00:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:42,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:00:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2021-11-13 18:00:43,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:43,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747817900] [2021-11-13 18:00:43,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568913227] [2021-11-13 18:00:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568913227] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:00:43,596 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:00:43,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-13 18:00:43,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978414727] [2021-11-13 18:00:43,596 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:43,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:00:43,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:00:43,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:00:43,598 INFO L87 Difference]: Start difference. First operand 313 states and 329 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 18:00:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:43,980 INFO L93 Difference]: Finished difference Result 319 states and 335 transitions. [2021-11-13 18:00:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:00:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128 [2021-11-13 18:00:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:43,983 INFO L225 Difference]: With dead ends: 319 [2021-11-13 18:00:43,984 INFO L226 Difference]: Without dead ends: 312 [2021-11-13 18:00:43,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:00:43,985 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 6 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 322.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:43,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 370 Invalid, 180 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 322.05ms Time] [2021-11-13 18:00:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-13 18:00:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2021-11-13 18:00:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 202 states have internal predecessors, (204), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-13 18:00:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2021-11-13 18:00:44,020 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 128 [2021-11-13 18:00:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:44,021 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2021-11-13 18:00:44,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 18:00:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2021-11-13 18:00:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:00:44,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:44,023 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:00:44,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:00:44,242 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:00:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 4 times [2021-11-13 18:00:44,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:44,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854897881] [2021-11-13 18:00:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:44,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:44,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:00:44,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249533765] [2021-11-13 18:00:44,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:00:44,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:00:44,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:44,262 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:00:44,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:00:47,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:00:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:00:47,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-13 18:00:47,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:00:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 310 proven. 320 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-13 18:00:48,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:00:55,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:55,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854897881] [2021-11-13 18:00:55,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:00:55,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249533765] [2021-11-13 18:00:55,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249533765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:00:55,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:00:55,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-13 18:00:55,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62484518] [2021-11-13 18:00:55,228 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:00:55,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:00:55,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:55,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:00:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:00:55,230 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-13 18:01:03,718 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:01:05,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:01:07,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-13 18:01:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:09,260 INFO L93 Difference]: Finished difference Result 319 states and 332 transitions. [2021-11-13 18:01:09,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:01:09,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 156 [2021-11-13 18:01:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:09,263 INFO L225 Difference]: With dead ends: 319 [2021-11-13 18:01:09,263 INFO L226 Difference]: Without dead ends: 293 [2021-11-13 18:01:09,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:01:09,265 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11184.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11215.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:09,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 133 Invalid, 183 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [52 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 11215.01ms Time] [2021-11-13 18:01:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-13 18:01:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-11-13 18:01:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 189 states have internal predecessors, (190), 53 states have call successors, (53), 51 states have call predecessors, (53), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2021-11-13 18:01:09,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2021-11-13 18:01:09,296 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 156 [2021-11-13 18:01:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:09,297 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2021-11-13 18:01:09,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 9 states have internal predecessors, (23), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-13 18:01:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2021-11-13 18:01:09,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-13 18:01:09,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:09,302 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:09,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-13 18:01:09,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:09,509 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:09,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times [2021-11-13 18:01:09,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:09,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182870561] [2021-11-13 18:01:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:09,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:09,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:01:09,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988772878] [2021-11-13 18:01:09,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:09,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:09,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:09,522 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:09,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:01:09,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2021-11-13 18:01:09,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:01:09,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 300 proven. 4880 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-11-13 18:01:10,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 102 proven. 380 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2021-11-13 18:01:11,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:11,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182870561] [2021-11-13 18:01:11,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:01:11,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988772878] [2021-11-13 18:01:11,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988772878] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:11,284 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:11,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-13 18:01:11,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014457247] [2021-11-13 18:01:11,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:11,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 18:01:11,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 18:01:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:01:11,287 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2021-11-13 18:01:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:12,200 INFO L93 Difference]: Finished difference Result 642 states and 656 transitions. [2021-11-13 18:01:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-13 18:01:12,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) Word has length 293 [2021-11-13 18:01:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:12,206 INFO L225 Difference]: With dead ends: 642 [2021-11-13 18:01:12,206 INFO L226 Difference]: Without dead ends: 629 [2021-11-13 18:01:12,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 18:01:12,208 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 174 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 418.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.87ms SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 523.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:12,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 515 Invalid, 635 Unknown, 0 Unchecked, 7.87ms Time], IncrementalHoareTripleChecker [186 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 523.49ms Time] [2021-11-13 18:01:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-11-13 18:01:12,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2021-11-13 18:01:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 404 states have (on average 1.004950495049505) internal successors, (406), 405 states have internal predecessors, (406), 113 states have call successors, (113), 111 states have call predecessors, (113), 111 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-13 18:01:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 631 transitions. [2021-11-13 18:01:12,265 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 631 transitions. Word has length 293 [2021-11-13 18:01:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:12,266 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 631 transitions. [2021-11-13 18:01:12,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2021-11-13 18:01:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 631 transitions. [2021-11-13 18:01:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-11-13 18:01:12,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:12,282 INFO L514 BasicCegarLoop]: trace histogram [112, 111, 111, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:12,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:12,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:12,488 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1604221590, now seen corresponding path program 4 times [2021-11-13 18:01:12,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:12,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262609019] [2021-11-13 18:01:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:12,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:12,504 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:01:12,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046908783] [2021-11-13 18:01:12,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:12,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:12,506 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:12,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:01:12,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:12,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-13 18:01:12,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 660 proven. 24992 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2021-11-13 18:01:14,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 222 proven. 1892 refuted. 0 times theorem prover too weak. 24420 trivial. 0 not checked. [2021-11-13 18:01:16,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:16,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262609019] [2021-11-13 18:01:16,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:01:16,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046908783] [2021-11-13 18:01:16,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046908783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:16,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:16,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-11-13 18:01:16,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821912885] [2021-11-13 18:01:16,494 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:16,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-13 18:01:16,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-13 18:01:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 18:01:16,499 INFO L87 Difference]: Start difference. First operand 629 states and 631 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2021-11-13 18:01:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:19,059 INFO L93 Difference]: Finished difference Result 1314 states and 1340 transitions. [2021-11-13 18:01:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-13 18:01:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) Word has length 629 [2021-11-13 18:01:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:19,070 INFO L225 Difference]: With dead ends: 1314 [2021-11-13 18:01:19,070 INFO L226 Difference]: Without dead ends: 1301 [2021-11-13 18:01:19,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1208 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2021-11-13 18:01:19,074 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 507 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1018.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 2082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.25ms SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1310.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:19,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [507 Valid, 1023 Invalid, 2082 Unknown, 0 Unchecked, 14.25ms Time], IncrementalHoareTripleChecker [645 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 1310.30ms Time] [2021-11-13 18:01:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-11-13 18:01:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1301. [2021-11-13 18:01:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 836 states have (on average 1.0023923444976077) internal successors, (838), 837 states have internal predecessors, (838), 233 states have call successors, (233), 231 states have call predecessors, (233), 231 states have return successors, (232), 232 states have call predecessors, (232), 232 states have call successors, (232) [2021-11-13 18:01:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1303 transitions. [2021-11-13 18:01:19,191 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1303 transitions. Word has length 629 [2021-11-13 18:01:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:19,193 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1303 transitions. [2021-11-13 18:01:19,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2021-11-13 18:01:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1303 transitions. [2021-11-13 18:01:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1302 [2021-11-13 18:01:19,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:19,274 INFO L514 BasicCegarLoop]: trace histogram [232, 231, 231, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:19,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:19,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 18:01:19,487 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1590306266, now seen corresponding path program 5 times [2021-11-13 18:01:19,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:19,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716369060] [2021-11-13 18:01:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:19,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:19,510 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:01:19,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030603728] [2021-11-13 18:01:19,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:01:19,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:19,512 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:19,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:01:49,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 163 check-sat command(s) [2021-11-13 18:01:49,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 2780 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-13 18:01:49,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 115094 backedges. 1380 proven. 111872 refuted. 0 times theorem prover too weak. 1842 trivial. 0 not checked. [2021-11-13 18:01:52,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 115094 backedges. 462 proven. 8372 refuted. 0 times theorem prover too weak. 106260 trivial. 0 not checked. [2021-11-13 18:01:55,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:55,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716369060] [2021-11-13 18:01:55,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:01:55,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030603728] [2021-11-13 18:01:55,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030603728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:55,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:55,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 54 [2021-11-13 18:01:55,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922011419] [2021-11-13 18:01:55,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:55,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-13 18:01:55,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:55,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-13 18:01:55,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 18:01:55,241 INFO L87 Difference]: Start difference. First operand 1301 states and 1303 transitions. Second operand has 54 states, 54 states have (on average 5.574074074074074) internal successors, (301), 54 states have internal predecessors, (301), 50 states have call successors, (463), 48 states have call predecessors, (463), 48 states have return successors, (462), 50 states have call predecessors, (462), 50 states have call successors, (462) [2021-11-13 18:01:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:57,864 INFO L93 Difference]: Finished difference Result 1426 states and 1432 transitions. [2021-11-13 18:01:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-13 18:01:57,866 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.574074074074074) internal successors, (301), 54 states have internal predecessors, (301), 50 states have call successors, (463), 48 states have call predecessors, (463), 48 states have return successors, (462), 50 states have call predecessors, (462), 50 states have call successors, (462) Word has length 1301 [2021-11-13 18:01:57,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:57,875 INFO L225 Difference]: With dead ends: 1426 [2021-11-13 18:01:57,876 INFO L226 Difference]: Without dead ends: 1413 [2021-11-13 18:01:57,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2649 GetRequests, 2547 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3926, Invalid=6580, Unknown=0, NotChecked=0, Total=10506 [2021-11-13 18:01:57,881 INFO L933 BasicCegarLoop]: 269 mSDtfsCounter, 170 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 914.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.63ms SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1120.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:57,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1073 Invalid, 1470 Unknown, 0 Unchecked, 11.63ms Time], IncrementalHoareTripleChecker [240 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1120.61ms Time] [2021-11-13 18:01:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-11-13 18:01:57,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1413. [2021-11-13 18:01:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 908 states have (on average 1.002202643171806) internal successors, (910), 909 states have internal predecessors, (910), 253 states have call successors, (253), 251 states have call predecessors, (253), 251 states have return successors, (252), 252 states have call predecessors, (252), 252 states have call successors, (252) [2021-11-13 18:01:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1415 transitions. [2021-11-13 18:01:57,997 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1415 transitions. Word has length 1301 [2021-11-13 18:01:57,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:57,999 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 1415 transitions. [2021-11-13 18:01:58,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.574074074074074) internal successors, (301), 54 states have internal predecessors, (301), 50 states have call successors, (463), 48 states have call predecessors, (463), 48 states have return successors, (462), 50 states have call predecessors, (462), 50 states have call successors, (462) [2021-11-13 18:01:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1415 transitions. [2021-11-13 18:01:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2021-11-13 18:01:58,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:58,034 INFO L514 BasicCegarLoop]: trace histogram [252, 251, 251, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:58,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:58,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:58,249 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2117698370, now seen corresponding path program 6 times [2021-11-13 18:01:58,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:58,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224437899] [2021-11-13 18:01:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:58,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:58,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:01:58,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159755416] [2021-11-13 18:01:58,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:01:58,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:58,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:58,278 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:58,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:02:16,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 175 check-sat command(s) [2021-11-13 18:02:16,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-13 18:02:16,068 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:02:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:02:17,320 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:02:17,321 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:02:17,322 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:02:17,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:17,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:02:17,543 INFO L732 BasicCegarLoop]: Path program histogram: [6, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:17,549 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:02:17,632 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:02:17,635 INFO L158 Benchmark]: Toolchain (without parser) took 117050.55ms. Allocated memory was 100.7MB in the beginning and 180.4MB in the end (delta: 79.7MB). Free memory was 65.3MB in the beginning and 76.0MB in the end (delta: -10.8MB). Peak memory consumption was 113.0MB. Max. memory is 16.1GB. [2021-11-13 18:02:17,636 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 100.7MB. Free memory was 71.3MB in the beginning and 71.3MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:02:17,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.67ms. Allocated memory is still 100.7MB. Free memory was 65.1MB in the beginning and 73.9MB in the end (delta: -8.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-13 18:02:17,636 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.32ms. Allocated memory is still 100.7MB. Free memory was 73.9MB in the beginning and 72.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:02:17,637 INFO L158 Benchmark]: Boogie Preprocessor took 31.73ms. Allocated memory is still 100.7MB. Free memory was 72.4MB in the beginning and 71.4MB in the end (delta: 996.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:02:17,637 INFO L158 Benchmark]: RCFGBuilder took 285.18ms. Allocated memory is still 100.7MB. Free memory was 71.1MB in the beginning and 61.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:02:17,638 INFO L158 Benchmark]: TraceAbstraction took 116376.58ms. Allocated memory was 100.7MB in the beginning and 180.4MB in the end (delta: 79.7MB). Free memory was 60.7MB in the beginning and 76.0MB in the end (delta: -15.3MB). Peak memory consumption was 109.7MB. Max. memory is 16.1GB. [2021-11-13 18:02:17,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 100.7MB. Free memory was 71.3MB in the beginning and 71.3MB in the end (delta: 29.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.67ms. Allocated memory is still 100.7MB. Free memory was 65.1MB in the beginning and 73.9MB in the end (delta: -8.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.32ms. Allocated memory is still 100.7MB. Free memory was 73.9MB in the beginning and 72.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.73ms. Allocated memory is still 100.7MB. Free memory was 72.4MB in the beginning and 71.4MB in the end (delta: 996.9kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 285.18ms. Allocated memory is still 100.7MB. Free memory was 71.1MB in the beginning and 61.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 116376.58ms. Allocated memory was 100.7MB in the beginning and 180.4MB in the end (delta: 79.7MB). Free memory was 60.7MB in the beginning and 76.0MB in the end (delta: -15.3MB). Peak memory consumption was 109.7MB. 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 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:02:17,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y --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 cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:02:20,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:02:20,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:02:20,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:02:20,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:02:20,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:02:20,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:02:20,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:02:20,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:02:20,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:02:20,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:02:20,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:02:20,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:02:20,189 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:02:20,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:02:20,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:02:20,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:02:20,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:02:20,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:02:20,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:02:20,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:02:20,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:02:20,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:02:20,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:02:20,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:02:20,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:02:20,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:02:20,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:02:20,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:02:20,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:02:20,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:02:20,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:02:20,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:02:20,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:02:20,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:02:20,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:02:20,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:02:20,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:02:20,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:02:20,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:02:20,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:02:20,228 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:02:20,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:02:20,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:02:20,255 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:02:20,256 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:02:20,256 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:02:20,257 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:02:20,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:02:20,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:02:20,258 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:02:20,258 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:02:20,258 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:02:20,259 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:02:20,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:02:20,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:02:20,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:02:20,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:02:20,260 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:02:20,260 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:02:20,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:02:20,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:02:20,261 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:02:20,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:02:20,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:02:20,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:02:20,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:02:20,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:02:20,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:02:20,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:02:20,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:02:20,263 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:02:20,263 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:02:20,263 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:02:20,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:02:20,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:02:20,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:02:20,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:02:20,265 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed [2021-11-13 18:02:20,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:02:20,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:02:20,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:02:20,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:02:20,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:02:20,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2021-11-13 18:02:20,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/e9fcb1f2e/d1814d0ac2044e6892f6f7a84100429b/FLAG4c7375151 [2021-11-13 18:02:21,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:02:21,294 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2021-11-13 18:02:21,303 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/e9fcb1f2e/d1814d0ac2044e6892f6f7a84100429b/FLAG4c7375151 [2021-11-13 18:02:21,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/data/e9fcb1f2e/d1814d0ac2044e6892f6f7a84100429b [2021-11-13 18:02:21,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:02:21,674 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:02:21,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:02:21,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:02:21,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:02:21,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:21,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@397d5e19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21, skipping insertion in model container [2021-11-13 18:02:21,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:21,690 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:02:21,706 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:02:21,855 WARN L228 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_27f4e316-21f0-4bbd-8880-a71c4feae115/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2021-11-13 18:02:21,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:02:21,893 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:02:21,905 WARN L228 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_27f4e316-21f0-4bbd-8880-a71c4feae115/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2021-11-13 18:02:21,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:02:21,939 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:02:21,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21 WrapperNode [2021-11-13 18:02:21,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:02:21,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:02:21,942 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:02:21,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:02:21,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:21,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:02:22,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:02:22,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:02:22,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:02:22,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:02:22,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:02:22,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:02:22,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:02:22,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (1/1) ... [2021-11-13 18:02:22,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:02:22,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:22,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:02:22,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:02:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:02:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:02:22,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:02:22,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:02:22,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 18:02:22,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 18:02:22,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:02:22,525 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:02:22,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:02:22 BoogieIcfgContainer [2021-11-13 18:02:22,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:02:22,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:02:22,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:02:22,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:02:22,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:02:21" (1/3) ... [2021-11-13 18:02:22,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fb8d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:02:22, skipping insertion in model container [2021-11-13 18:02:22,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:02:21" (2/3) ... [2021-11-13 18:02:22,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fb8d8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:02:22, skipping insertion in model container [2021-11-13 18:02:22,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:02:22" (3/3) ... [2021-11-13 18:02:22,547 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound50.c [2021-11-13 18:02:22,553 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:02:22,553 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:02:22,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:02:22,686 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 [2021-11-13 18:02:22,686 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:02:22,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-13 18:02:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:02:22,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:22,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:22,709 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:22,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2021-11-13 18:02:22,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:22,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65390113] [2021-11-13 18:02:22,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:22,742 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:22,746 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:22,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:02:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:02:22,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:22,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:22,932 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:22,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65390113] [2021-11-13 18:02:22,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65390113] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:02:22,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:02:22,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:02:22,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342855147] [2021-11-13 18:02:22,939 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:02:22,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:02:22,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:02:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:02:22,988 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:23,026 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2021-11-13 18:02:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:02:23,028 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-13 18:02:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:23,040 INFO L225 Difference]: With dead ends: 50 [2021-11-13 18:02:23,041 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 18:02:23,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:02:23,053 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.59ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:23,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 1.59ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:02:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 18:02:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-13 18:02:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-13 18:02:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2021-11-13 18:02:23,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2021-11-13 18:02:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:23,120 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-11-13 18:02:23,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:23,121 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2021-11-13 18:02:23,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:02:23,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:23,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:23,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:23,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:02:23,336 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:23,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:23,337 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2021-11-13 18:02:23,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:23,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071077901] [2021-11-13 18:02:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:23,338 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:23,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:23,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:23,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:02:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:02:23,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:23,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:23,569 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:23,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071077901] [2021-11-13 18:02:23,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071077901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:02:23,570 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:02:23,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-13 18:02:23,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132099696] [2021-11-13 18:02:23,571 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:02:23,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:02:23,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:23,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:02:23,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:02:23,574 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:26,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:26,657 INFO L93 Difference]: Finished difference Result 56 states and 83 transitions. [2021-11-13 18:02:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:02:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:02:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:26,674 INFO L225 Difference]: With dead ends: 56 [2021-11-13 18:02:26,675 INFO L226 Difference]: Without dead ends: 44 [2021-11-13 18:02:26,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:02:26,678 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2854.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3045.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:26,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 127 Invalid, 34 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 3045.35ms Time] [2021-11-13 18:02:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-13 18:02:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-13 18:02:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:02:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 64 transitions. [2021-11-13 18:02:26,704 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 64 transitions. Word has length 8 [2021-11-13 18:02:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:26,705 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 64 transitions. [2021-11-13 18:02:26,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 64 transitions. [2021-11-13 18:02:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-13 18:02:26,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:26,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:26,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:26,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:02:26,913 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:26,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:26,914 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2021-11-13 18:02:26,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:26,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123281347] [2021-11-13 18:02:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:26,915 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:26,920 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:26,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:02:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:26,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:02:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:27,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:27,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:27,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123281347] [2021-11-13 18:02:27,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123281347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:02:27,262 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:02:27,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:02:27,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973815542] [2021-11-13 18:02:27,263 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:02:27,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:02:27,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:02:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:02:27,265 INFO L87 Difference]: Start difference. First operand 42 states and 64 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:29,488 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:30,506 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-11-13 18:02:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:02:30,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-13 18:02:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:30,518 INFO L225 Difference]: With dead ends: 52 [2021-11-13 18:02:30,518 INFO L226 Difference]: Without dead ends: 50 [2021-11-13 18:02:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:02:30,520 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2966.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.35ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3195.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:30,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 185 Invalid, 79 Unknown, 0 Unchecked, 5.35ms Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 3195.51ms Time] [2021-11-13 18:02:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-13 18:02:30,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-13 18:02:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 22 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:02:30,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2021-11-13 18:02:30,572 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 8 [2021-11-13 18:02:30,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:30,572 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2021-11-13 18:02:30,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:02:30,573 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2021-11-13 18:02:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:02:30,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:30,574 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:30,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:30,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:02:30,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:30,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:30,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2021-11-13 18:02:30,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:30,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34802774] [2021-11-13 18:02:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:30,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:30,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:30,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:30,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:02:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:02:30,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:31,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:02:33,041 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:33,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34802774] [2021-11-13 18:02:33,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34802774] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:02:33,042 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:02:33,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:02:33,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464380702] [2021-11-13 18:02:33,043 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:02:33,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:02:33,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:33,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:02:33,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:02:33,045 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:02:34,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:34,461 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2021-11-13 18:02:34,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:02:34,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-13 18:02:34,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:34,475 INFO L225 Difference]: With dead ends: 56 [2021-11-13 18:02:34,475 INFO L226 Difference]: Without dead ends: 54 [2021-11-13 18:02:34,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:02:34,477 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1174.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.87ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1299.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:34,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 168 Invalid, 35 Unknown, 0 Unchecked, 2.87ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 1299.12ms Time] [2021-11-13 18:02:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-13 18:02:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-13 18:02:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 22 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:02:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2021-11-13 18:02:34,495 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 13 [2021-11-13 18:02:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:34,495 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2021-11-13 18:02:34,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:02:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2021-11-13 18:02:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:02:34,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:34,497 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:34,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:34,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:02:34,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:34,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:34,712 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2021-11-13 18:02:34,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:34,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321600241] [2021-11-13 18:02:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:34,718 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:34,719 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:34,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:02:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:34,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:02:34,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:02:35,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:02:38,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:38,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321600241] [2021-11-13 18:02:38,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321600241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:02:38,145 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:02:38,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:02:38,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368265020] [2021-11-13 18:02:38,145 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:02:38,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:02:38,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:02:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:02:38,147 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:02:40,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:40,645 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2021-11-13 18:02:40,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:02:40,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2021-11-13 18:02:40,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:40,658 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:02:40,658 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:02:40,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:02:40,660 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2004.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2267.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:40,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 134 Invalid, 44 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 2267.06ms Time] [2021-11-13 18:02:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:02:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-13 18:02:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 18:02:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-11-13 18:02:40,679 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 18 [2021-11-13 18:02:40,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:40,680 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-11-13 18:02:40,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:02:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2021-11-13 18:02:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:02:40,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:40,682 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:40,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:40,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:02:40,897 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:40,898 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2021-11-13 18:02:40,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:40,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120553743] [2021-11-13 18:02:40,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:40,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:40,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:40,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:40,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:02:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:41,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:02:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:02:41,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:02:44,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:44,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120553743] [2021-11-13 18:02:44,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120553743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:02:44,444 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:02:44,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:02:44,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876028576] [2021-11-13 18:02:44,446 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:02:44,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:02:44,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:02:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:02:44,450 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:02:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:52,337 INFO L93 Difference]: Finished difference Result 80 states and 107 transitions. [2021-11-13 18:02:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:02:52,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23 [2021-11-13 18:02:52,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:52,350 INFO L225 Difference]: With dead ends: 80 [2021-11-13 18:02:52,350 INFO L226 Difference]: Without dead ends: 67 [2021-11-13 18:02:52,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:02:52,354 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7116.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.61ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7685.35ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:52,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 189 Invalid, 98 Unknown, 0 Unchecked, 4.61ms Time], IncrementalHoareTripleChecker [17 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 7685.35ms Time] [2021-11-13 18:02:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-13 18:02:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-11-13 18:02:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-13 18:02:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2021-11-13 18:02:52,372 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 23 [2021-11-13 18:02:52,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:52,373 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2021-11-13 18:02:52,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:02:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2021-11-13 18:02:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:02:52,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:52,375 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:02:52,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:02:52,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:02:52,594 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:02:52,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:52,595 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2021-11-13 18:02:52,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:02:52,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532401323] [2021-11-13 18:02:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:52,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:02:52,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:02:52,596 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:02:52,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:02:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:52,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:02:52,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:02:53,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:02:58,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:02:58,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532401323] [2021-11-13 18:02:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532401323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:02:58,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:02:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:02:58,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134821951] [2021-11-13 18:02:58,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:58,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:02:58,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:02:58,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:02:58,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:02:58,034 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 18:03:03,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:05,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:12,221 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:14,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:17,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:21,077 INFO L93 Difference]: Finished difference Result 109 states and 150 transitions. [2021-11-13 18:03:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:03:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2021-11-13 18:03:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:21,088 INFO L225 Difference]: With dead ends: 109 [2021-11-13 18:03:21,089 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 18:03:21,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:03:21,090 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 14 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 42 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20041.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.45ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21127.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:21,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 432 Invalid, 230 Unknown, 0 Unchecked, 7.45ms Time], IncrementalHoareTripleChecker [42 Valid, 183 Invalid, 5 Unknown, 0 Unchecked, 21127.99ms Time] [2021-11-13 18:03:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 18:03:21,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-11-13 18:03:21,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 33 states have call successors, (33), 10 states have call predecessors, (33), 10 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-13 18:03:21,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-11-13 18:03:21,118 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 41 [2021-11-13 18:03:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:21,119 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-11-13 18:03:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 18:03:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-11-13 18:03:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:03:21,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:21,121 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:21,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:21,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:21,340 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:21,344 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2021-11-13 18:03:21,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:21,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185817389] [2021-11-13 18:03:21,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:03:21,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:21,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:21,346 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:21,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:03:21,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:03:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:03:21,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:03:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:03:22,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:03:33,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:03:33,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185817389] [2021-11-13 18:03:33,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185817389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:33,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:03:33,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:03:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006382077] [2021-11-13 18:03:33,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:03:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:03:33,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:03:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:03:33,694 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:03:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:39,030 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-11-13 18:03:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:03:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2021-11-13 18:03:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:39,044 INFO L225 Difference]: With dead ends: 97 [2021-11-13 18:03:39,045 INFO L226 Difference]: Without dead ends: 95 [2021-11-13 18:03:39,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:03:39,046 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 7 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4456.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4918.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:39,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 339 Invalid, 121 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [7 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 4918.95ms Time] [2021-11-13 18:03:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-13 18:03:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-13 18:03:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 33 states have call successors, (33), 11 states have call predecessors, (33), 11 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-13 18:03:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2021-11-13 18:03:39,072 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 46 [2021-11-13 18:03:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:39,073 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2021-11-13 18:03:39,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:03:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2021-11-13 18:03:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:03:39,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:39,076 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:39,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:39,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:03:39,297 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:39,297 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2021-11-13 18:03:39,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:03:39,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086845058] [2021-11-13 18:03:39,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:39,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:03:39,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:03:39,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:03:39,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:03:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:39,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:03:39,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-13 18:03:40,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-13 18:04:18,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:18,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086845058] [2021-11-13 18:04:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086845058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:18,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:18,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-13 18:04:18,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640616765] [2021-11-13 18:04:18,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:18,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:04:18,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:04:18,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:04:18,280 INFO L87 Difference]: Start difference. First operand 95 states and 121 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 18:04:22,298 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-13 18:04:34,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:34,640 INFO L93 Difference]: Finished difference Result 113 states and 148 transitions. [2021-11-13 18:04:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:04:34,658 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 67 [2021-11-13 18:04:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:34,660 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:04:34,660 INFO L226 Difference]: Without dead ends: 111 [2021-11-13 18:04:34,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:04:34,662 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 16 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14552.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.62ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 15665.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:34,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 319 Invalid, 224 Unknown, 0 Unchecked, 4.62ms Time], IncrementalHoareTripleChecker [37 Valid, 165 Invalid, 1 Unknown, 21 Unchecked, 15665.01ms Time] [2021-11-13 18:04:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-13 18:04:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2021-11-13 18:04:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 57 states have internal predecessors, (60), 35 states have call successors, (35), 12 states have call predecessors, (35), 12 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-13 18:04:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2021-11-13 18:04:34,689 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 67 [2021-11-13 18:04:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:34,690 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2021-11-13 18:04:34,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2021-11-13 18:04:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2021-11-13 18:04:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:04:34,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:34,693 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:34,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:34,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:34,918 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1946665570, now seen corresponding path program 1 times [2021-11-13 18:04:34,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:34,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296258904] [2021-11-13 18:04:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:34,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:34,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:34,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:04:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:04:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 60 proven. 112 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:04:35,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-13 18:04:36,355 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:36,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296258904] [2021-11-13 18:04:36,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296258904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:36,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:36,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-13 18:04:36,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160596675] [2021-11-13 18:04:36,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:36,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:36,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:36,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:36,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:36,357 INFO L87 Difference]: Start difference. First operand 101 states and 128 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 18:04:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:50,759 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2021-11-13 18:04:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:04:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 69 [2021-11-13 18:04:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:50,772 INFO L225 Difference]: With dead ends: 195 [2021-11-13 18:04:50,772 INFO L226 Difference]: Without dead ends: 179 [2021-11-13 18:04:50,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:04:50,774 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 89 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13091.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.91ms SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14097.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:50,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 266 Invalid, 335 Unknown, 0 Unchecked, 4.91ms Time], IncrementalHoareTripleChecker [151 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 14097.61ms Time] [2021-11-13 18:04:50,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-13 18:04:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 171. [2021-11-13 18:04:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 94 states have internal predecessors, (100), 59 states have call successors, (59), 22 states have call predecessors, (59), 22 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2021-11-13 18:04:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 213 transitions. [2021-11-13 18:04:50,811 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 213 transitions. Word has length 69 [2021-11-13 18:04:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:50,811 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 213 transitions. [2021-11-13 18:04:50,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-13 18:04:50,812 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 213 transitions. [2021-11-13 18:04:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:04:50,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:50,814 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:50,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:51,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:51,029 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2021-11-13 18:04:51,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:51,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457011240] [2021-11-13 18:04:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:51,030 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:51,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:51,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:51,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27f4e316-21f0-4bbd-8880-a71c4feae115/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:04:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:51,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:04:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:55,069 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-13 18:04:55,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:08,272 WARN L227 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)