./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ --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 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:45:19,184 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:45:19,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:45:19,250 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:45:19,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:45:19,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:45:19,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:45:19,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:45:19,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:45:19,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:45:19,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:45:19,281 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:45:19,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:45:19,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:45:19,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:45:19,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:45:19,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:45:19,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:45:19,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:45:19,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:45:19,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:45:19,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:45:19,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:45:19,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:45:19,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:45:19,332 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:45:19,332 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:45:19,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:45:19,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:45:19,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:45:19,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:45:19,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:45:19,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:45:19,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:45:19,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:45:19,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:45:19,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:45:19,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:45:19,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:45:19,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:45:19,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:45:19,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:45:19,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:45:19,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:45:19,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:45:19,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:45:19,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:45:19,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:45:19,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:45:19,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:45:19,415 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:45:19,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:45:19,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:45:19,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:45:19,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:45:19,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:45:19,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:45:19,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:45:19,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:45:19,418 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:45:19,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:45:19,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:45:19,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:45:19,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:45:19,419 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:45:19,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:45:19,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:45:19,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:45:19,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:45:19,432 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:45:19,432 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:45:19,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:45:19,433 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:45:19,433 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:45:19,433 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:45:19,434 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_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bfe5681b6d73d5859a119345279b9da165675f4eb4d814fdf24f92881f7a27f [2022-10-17 10:45:19,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:45:19,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:45:19,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:45:19,791 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:45:19,792 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:45:19,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-10-17 10:45:19,884 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/data/77a3868e4/aa160178d99b4d589b82a368d55f7442/FLAG9db56349e [2022-10-17 10:45:20,465 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:45:20,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c [2022-10-17 10:45:20,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/data/77a3868e4/aa160178d99b4d589b82a368d55f7442/FLAG9db56349e [2022-10-17 10:45:20,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/data/77a3868e4/aa160178d99b4d589b82a368d55f7442 [2022-10-17 10:45:20,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:45:20,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:45:20,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:45:20,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:45:20,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:45:20,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:45:20" (1/1) ... [2022-10-17 10:45:20,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@561bbd6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:20, skipping insertion in model container [2022-10-17 10:45:20,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:45:20" (1/1) ... [2022-10-17 10:45:20,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:45:20,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:45:21,092 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2022-10-17 10:45:21,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:45:21,143 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:45:21,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound50.c[458,471] [2022-10-17 10:45:21,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:45:21,184 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:45:21,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21 WrapperNode [2022-10-17 10:45:21,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:45:21,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:45:21,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:45:21,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:45:21,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,204 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,226 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-10-17 10:45:21,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:45:21,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:45:21,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:45:21,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:45:21,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:45:21,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:45:21,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:45:21,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:45:21,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (1/1) ... [2022-10-17 10:45:21,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:45:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:21,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:45:21,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:45:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:45:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:45:21,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:45:21,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:45:21,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:45:21,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:45:21,456 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:45:21,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:45:21,649 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:45:21,656 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:45:21,656 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:45:21,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:45:21 BoogieIcfgContainer [2022-10-17 10:45:21,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:45:21,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:45:21,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:45:21,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:45:21,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:45:20" (1/3) ... [2022-10-17 10:45:21,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13db8c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:45:21, skipping insertion in model container [2022-10-17 10:45:21,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:45:21" (2/3) ... [2022-10-17 10:45:21,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13db8c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:45:21, skipping insertion in model container [2022-10-17 10:45:21,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:45:21" (3/3) ... [2022-10-17 10:45:21,670 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound50.c [2022-10-17 10:45:21,694 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:45:21,695 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:45:21,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:45:21,768 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@790880c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:45:21,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:45:21,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:45:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:45:21,783 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:21,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:21,784 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2022-10-17 10:45:21,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:21,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984519255] [2022-10-17 10:45:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:21,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:21,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:21,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984519255] [2022-10-17 10:45:21,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:45:21,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779256463] [2022-10-17 10:45:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:21,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:21,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:21,992 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:21,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:45:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:22,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:45:22,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:45:22,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:45:22,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779256463] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:45:22,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:45:22,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:45:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413675601] [2022-10-17 10:45:22,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:45:22,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:45:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:45:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:45:22,171 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-10-17 10:45:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:22,217 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-10-17 10:45:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:45:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2022-10-17 10:45:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:22,244 INFO L225 Difference]: With dead ends: 37 [2022-10-17 10:45:22,245 INFO L226 Difference]: Without dead ends: 16 [2022-10-17 10:45:22,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:45:22,257 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:22,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:45:22,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-10-17 10:45:22,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-10-17 10:45:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:45:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-10-17 10:45:22,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-10-17 10:45:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:22,323 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-10-17 10:45:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-10-17 10:45:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-10-17 10:45:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:45:22,325 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:22,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:22,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:22,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:45:22,532 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2022-10-17 10:45:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:22,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304678025] [2022-10-17 10:45:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:22,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:22,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:22,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304678025] [2022-10-17 10:45:22,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:45:22,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916089386] [2022-10-17 10:45:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:22,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:22,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:22,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:22,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:45:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:22,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:45:22,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:22,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:45:22,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:45:22,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916089386] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:45:22,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:45:22,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:45:22,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529270462] [2022-10-17 10:45:22,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:45:22,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:45:22,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:45:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:45:22,823 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:45:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:22,854 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-10-17 10:45:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:45:22,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:45:22,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:22,856 INFO L225 Difference]: With dead ends: 26 [2022-10-17 10:45:22,857 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 10:45:22,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:45:22,860 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:22,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:45:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 10:45:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 10:45:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:45:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-10-17 10:45:22,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2022-10-17 10:45:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:22,874 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-10-17 10:45:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:45:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-10-17 10:45:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:45:22,875 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:22,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:22,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:23,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:23,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:23,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2022-10-17 10:45:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:23,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556117628] [2022-10-17 10:45:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:23,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:23,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798821161] [2022-10-17 10:45:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:23,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:23,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:23,124 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:23,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:45:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:45:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:45:23,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:45:23,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556117628] [2022-10-17 10:45:23,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:23,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798821161] [2022-10-17 10:45:23,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798821161] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:45:23,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:45:23,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:45:23,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798222151] [2022-10-17 10:45:23,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:45:23,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:45:23,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:23,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:45:23,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:45:23,333 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:45:24,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:24,022 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-10-17 10:45:24,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:45:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:45:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:24,025 INFO L225 Difference]: With dead ends: 28 [2022-10-17 10:45:24,025 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 10:45:24,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:45:24,028 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:24,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 10:45:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 10:45:24,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-17 10:45:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:45:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-10-17 10:45:24,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-10-17 10:45:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:24,040 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-10-17 10:45:24,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:45:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-10-17 10:45:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:45:24,042 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:24,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:24,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-10-17 10:45:24,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:24,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:24,244 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2022-10-17 10:45:24,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:24,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174525386] [2022-10-17 10:45:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:24,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:24,270 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:24,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900888368] [2022-10-17 10:45:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:24,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:24,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:24,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:45:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:45:24,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:45:24,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:45:24,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:24,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174525386] [2022-10-17 10:45:24,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:24,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900888368] [2022-10-17 10:45:24,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900888368] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:45:24,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:45:24,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-10-17 10:45:24,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625496578] [2022-10-17 10:45:24,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:24,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:45:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:24,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:45:24,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:45:24,553 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:45:24,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:24,773 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-10-17 10:45:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:45:24,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-10-17 10:45:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:24,777 INFO L225 Difference]: With dead ends: 58 [2022-10-17 10:45:24,778 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 10:45:24,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:45:24,780 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:24,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:45:24,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 10:45:24,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-10-17 10:45:24,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:45:24,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-10-17 10:45:24,811 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2022-10-17 10:45:24,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:24,812 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-10-17 10:45:24,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:45:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-10-17 10:45:24,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:45:24,820 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:24,820 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:24,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:25,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:25,021 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:25,022 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2022-10-17 10:45:25,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:25,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104154830] [2022-10-17 10:45:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:25,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:25,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:25,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074740009] [2022-10-17 10:45:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:25,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:25,062 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:25,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:45:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:25,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:45:25,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:45:25,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:45:25,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104154830] [2022-10-17 10:45:25,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:25,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074740009] [2022-10-17 10:45:25,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074740009] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:25,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:25,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-10-17 10:45:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430892019] [2022-10-17 10:45:25,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:45:25,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:45:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:45:25,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:45:25,587 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-10-17 10:45:25,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:25,670 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-10-17 10:45:25,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:45:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 18 [2022-10-17 10:45:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:25,672 INFO L225 Difference]: With dead ends: 60 [2022-10-17 10:45:25,672 INFO L226 Difference]: Without dead ends: 52 [2022-10-17 10:45:25,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:45:25,675 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:25,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:45:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-17 10:45:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-10-17 10:45:25,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:45:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-10-17 10:45:25,708 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2022-10-17 10:45:25,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:25,709 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-10-17 10:45:25,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-10-17 10:45:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-10-17 10:45:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:45:25,711 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:25,711 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:25,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:25,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:25,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2022-10-17 10:45:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:25,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919269620] [2022-10-17 10:45:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:25,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:25,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929685747] [2022-10-17 10:45:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:25,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:25,964 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:25,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:45:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:26,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:45:26,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:45:26,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:26,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919269620] [2022-10-17 10:45:26,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929685747] [2022-10-17 10:45:26,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929685747] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:26,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:26,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-10-17 10:45:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618848337] [2022-10-17 10:45:26,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:26,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:45:26,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:26,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:45:26,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:45:26,533 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:45:26,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:26,681 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-10-17 10:45:26,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:45:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-10-17 10:45:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:26,685 INFO L225 Difference]: With dead ends: 51 [2022-10-17 10:45:26,685 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 10:45:26,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:45:26,691 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:26,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:45:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 10:45:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-17 10:45:26,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 10:45:26,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-10-17 10:45:26,723 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2022-10-17 10:45:26,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:26,724 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-10-17 10:45:26,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:45:26,725 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-10-17 10:45:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:45:26,726 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:26,727 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:26,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:26,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:45:26,941 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:26,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:26,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2022-10-17 10:45:26,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:26,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985199389] [2022-10-17 10:45:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:26,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:26,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432158671] [2022-10-17 10:45:26,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:45:26,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:26,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:26,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:26,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:45:27,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:45:27,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:27,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-17 10:45:27,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:45:27,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:27,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:27,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985199389] [2022-10-17 10:45:27,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:27,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432158671] [2022-10-17 10:45:27,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432158671] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:27,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:27,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-10-17 10:45:27,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729004833] [2022-10-17 10:45:27,695 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:27,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:45:27,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:45:27,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:45:27,697 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:45:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:27,874 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-10-17 10:45:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:45:27,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-10-17 10:45:27,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:27,876 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:45:27,876 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:45:27,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:45:27,878 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:27,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:45:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:45:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-17 10:45:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:45:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-10-17 10:45:27,899 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2022-10-17 10:45:27,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:27,899 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-10-17 10:45:27,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:45:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-10-17 10:45:27,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:45:27,902 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:27,902 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:27,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:28,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:28,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:28,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2022-10-17 10:45:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616959122] [2022-10-17 10:45:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:28,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:28,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129559129] [2022-10-17 10:45:28,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:45:28,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:28,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:28,182 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:28,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:45:28,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 10:45:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:28,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-10-17 10:45:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:45:28,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:29,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616959122] [2022-10-17 10:45:29,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:29,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129559129] [2022-10-17 10:45:29,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129559129] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:29,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:29,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-10-17 10:45:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267707242] [2022-10-17 10:45:29,196 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:29,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:45:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:45:29,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:45:29,202 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:45:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:29,430 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-10-17 10:45:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:45:29,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2022-10-17 10:45:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:29,432 INFO L225 Difference]: With dead ends: 52 [2022-10-17 10:45:29,432 INFO L226 Difference]: Without dead ends: 46 [2022-10-17 10:45:29,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:45:29,438 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:29,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 161 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:45:29,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-10-17 10:45:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-10-17 10:45:29,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 10:45:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-10-17 10:45:29,470 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2022-10-17 10:45:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:29,471 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-10-17 10:45:29,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:45:29,472 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-10-17 10:45:29,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-10-17 10:45:29,479 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:29,480 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:29,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:29,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:29,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:29,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2022-10-17 10:45:29,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:29,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025848362] [2022-10-17 10:45:29,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:29,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:29,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:29,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636762089] [2022-10-17 10:45:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:29,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:29,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:29,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:45:29,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:29,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:45:29,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:45:29,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-10-17 10:45:30,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025848362] [2022-10-17 10:45:30,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:30,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636762089] [2022-10-17 10:45:30,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636762089] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:45:30,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:45:30,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-10-17 10:45:30,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296097100] [2022-10-17 10:45:30,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:30,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:45:30,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:45:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:45:30,093 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-17 10:45:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:30,456 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2022-10-17 10:45:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-10-17 10:45:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2022-10-17 10:45:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:30,459 INFO L225 Difference]: With dead ends: 132 [2022-10-17 10:45:30,460 INFO L226 Difference]: Without dead ends: 122 [2022-10-17 10:45:30,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:45:30,464 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 146 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:30,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 136 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:45:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-10-17 10:45:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2022-10-17 10:45:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-17 10:45:30,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2022-10-17 10:45:30,531 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2022-10-17 10:45:30,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:30,531 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2022-10-17 10:45:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-10-17 10:45:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2022-10-17 10:45:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 10:45:30,534 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:30,534 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:30,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:30,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:30,754 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:30,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 4 times [2022-10-17 10:45:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120333491] [2022-10-17 10:45:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:30,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:30,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485964580] [2022-10-17 10:45:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:45:30,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:30,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:30,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:30,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:45:30,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:45:30,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2022-10-17 10:45:30,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-10-17 10:45:31,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:31,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120333491] [2022-10-17 10:45:31,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485964580] [2022-10-17 10:45:31,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485964580] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:31,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:31,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-10-17 10:45:31,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375715179] [2022-10-17 10:45:31,390 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:31,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-10-17 10:45:31,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:31,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-10-17 10:45:31,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:45:31,393 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 10:45:31,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:31,643 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2022-10-17 10:45:31,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:45:31,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-10-17 10:45:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:31,649 INFO L225 Difference]: With dead ends: 102 [2022-10-17 10:45:31,650 INFO L226 Difference]: Without dead ends: 96 [2022-10-17 10:45:31,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:45:31,651 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:31,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 197 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:45:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-17 10:45:31,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-10-17 10:45:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 10:45:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-10-17 10:45:31,719 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 53 [2022-10-17 10:45:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:31,723 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-10-17 10:45:31,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 10:45:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-10-17 10:45:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-17 10:45:31,726 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:31,727 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:31,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:31,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:31,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 5 times [2022-10-17 10:45:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331175295] [2022-10-17 10:45:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:31,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:31,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:31,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528573146] [2022-10-17 10:45:31,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:45:31,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:32,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:32,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:32,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:45:33,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-10-17 10:45:33,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-17 10:45:33,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:45:33,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:33,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331175295] [2022-10-17 10:45:33,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:33,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528573146] [2022-10-17 10:45:33,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528573146] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:33,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:33,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-10-17 10:45:33,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327572875] [2022-10-17 10:45:33,642 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:33,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:45:33,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:33,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:45:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:45:33,644 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:45:33,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:33,942 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-10-17 10:45:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:45:33,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-10-17 10:45:33,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:33,944 INFO L225 Difference]: With dead ends: 101 [2022-10-17 10:45:33,945 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 10:45:33,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:45:33,946 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:33,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:45:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 10:45:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-10-17 10:45:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 10:45:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-10-17 10:45:33,975 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2022-10-17 10:45:33,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:33,975 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-10-17 10:45:33,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-10-17 10:45:33,976 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-10-17 10:45:33,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-10-17 10:45:33,977 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:33,977 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:33,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:34,184 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:34,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:34,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 6 times [2022-10-17 10:45:34,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:34,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193746340] [2022-10-17 10:45:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:34,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:34,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:34,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773571072] [2022-10-17 10:45:34,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:45:34,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:34,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:34,219 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:34,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:45:34,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-10-17 10:45:34,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:34,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2022-10-17 10:45:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-10-17 10:45:35,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:36,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193746340] [2022-10-17 10:45:36,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:36,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773571072] [2022-10-17 10:45:36,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773571072] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:36,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:36,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-10-17 10:45:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998658960] [2022-10-17 10:45:36,259 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:36,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:45:36,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:45:36,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:45:36,261 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:45:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:36,639 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-10-17 10:45:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:45:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-10-17 10:45:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:36,641 INFO L225 Difference]: With dead ends: 100 [2022-10-17 10:45:36,641 INFO L226 Difference]: Without dead ends: 94 [2022-10-17 10:45:36,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:45:36,643 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:36,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:45:36,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-17 10:45:36,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-10-17 10:45:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:45:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-10-17 10:45:36,669 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2022-10-17 10:45:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:36,669 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-10-17 10:45:36,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:45:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-10-17 10:45:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-17 10:45:36,671 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:36,672 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:36,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:36,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:36,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 7 times [2022-10-17 10:45:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:36,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262898036] [2022-10-17 10:45:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:36,903 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:36,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841059559] [2022-10-17 10:45:36,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 10:45:36,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:36,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:36,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:36,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 10:45:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:45:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-17 10:45:37,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-10-17 10:45:38,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:38,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262898036] [2022-10-17 10:45:38,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:38,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841059559] [2022-10-17 10:45:38,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841059559] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:38,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:38,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-10-17 10:45:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87067973] [2022-10-17 10:45:38,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:38,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-10-17 10:45:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-10-17 10:45:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:45:38,320 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:45:38,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:38,729 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-10-17 10:45:38,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:45:38,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-10-17 10:45:38,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:38,730 INFO L225 Difference]: With dead ends: 99 [2022-10-17 10:45:38,731 INFO L226 Difference]: Without dead ends: 93 [2022-10-17 10:45:38,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:45:38,732 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:38,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 335 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:45:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-10-17 10:45:38,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-10-17 10:45:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-17 10:45:38,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-10-17 10:45:38,757 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2022-10-17 10:45:38,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:38,757 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-10-17 10:45:38,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:45:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-10-17 10:45:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-10-17 10:45:38,759 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:38,759 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:38,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:38,965 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 8 times [2022-10-17 10:45:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:38,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800797142] [2022-10-17 10:45:38,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:38,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:39,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:39,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949744444] [2022-10-17 10:45:39,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:45:39,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:39,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:39,003 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:39,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-17 10:45:40,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:45:40,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:40,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 54 conjunts are in the unsatisfiable core [2022-10-17 10:45:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 63 proven. 149 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-10-17 10:45:41,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:41,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800797142] [2022-10-17 10:45:41,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:41,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949744444] [2022-10-17 10:45:41,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949744444] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:41,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:41,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-10-17 10:45:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270233560] [2022-10-17 10:45:41,607 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:45:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:45:41,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:45:41,609 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-10-17 10:45:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:42,299 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-10-17 10:45:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:45:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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) Word has length 85 [2022-10-17 10:45:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:42,301 INFO L225 Difference]: With dead ends: 98 [2022-10-17 10:45:42,301 INFO L226 Difference]: Without dead ends: 92 [2022-10-17 10:45:42,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:45:42,303 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:42,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 417 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 10:45:42,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-17 10:45:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-10-17 10:45:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:45:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-10-17 10:45:42,333 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2022-10-17 10:45:42,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:42,333 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-10-17 10:45:42,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-10-17 10:45:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-10-17 10:45:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-17 10:45:42,343 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:42,343 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:42,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:42,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:45:42,550 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 9 times [2022-10-17 10:45:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:42,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875147285] [2022-10-17 10:45:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:42,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:42,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:42,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067007957] [2022-10-17 10:45:42,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:45:42,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:42,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:42,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:42,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-17 10:45:44,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-10-17 10:45:44,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2022-10-17 10:45:44,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-17 10:45:44,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:44,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:44,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875147285] [2022-10-17 10:45:44,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067007957] [2022-10-17 10:45:44,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067007957] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:44,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:44,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-10-17 10:45:44,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716436132] [2022-10-17 10:45:44,874 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:45:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:45:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:45:44,875 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:45:45,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:45,425 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-10-17 10:45:45,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:45:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2022-10-17 10:45:45,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:45,427 INFO L225 Difference]: With dead ends: 100 [2022-10-17 10:45:45,427 INFO L226 Difference]: Without dead ends: 94 [2022-10-17 10:45:45,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:45:45,429 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:45,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 449 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:45:45,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-10-17 10:45:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-10-17 10:45:45,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-17 10:45:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-10-17 10:45:45,453 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 93 [2022-10-17 10:45:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:45,453 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-10-17 10:45:45,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:45:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-10-17 10:45:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-10-17 10:45:45,455 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:45,455 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:45,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:45,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-17 10:45:45,662 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2022-10-17 10:45:45,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:45,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782062309] [2022-10-17 10:45:45,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:45,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:45,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:45,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416628729] [2022-10-17 10:45:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:45:45,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:45,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:45,691 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:45,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-10-17 10:45:45,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:45:45,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:45,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-10-17 10:45:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:45:46,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-17 10:45:46,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782062309] [2022-10-17 10:45:46,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:46,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416628729] [2022-10-17 10:45:46,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416628729] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:45:46,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:45:46,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-10-17 10:45:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486512376] [2022-10-17 10:45:46,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:46,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-10-17 10:45:46,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-10-17 10:45:46,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:45:46,488 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-10-17 10:45:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:47,315 INFO L93 Difference]: Finished difference Result 264 states and 288 transitions. [2022-10-17 10:45:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-10-17 10:45:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 95 [2022-10-17 10:45:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:47,319 INFO L225 Difference]: With dead ends: 264 [2022-10-17 10:45:47,319 INFO L226 Difference]: Without dead ends: 254 [2022-10-17 10:45:47,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-10-17 10:45:47,322 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 269 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:47,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 241 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:45:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-10-17 10:45:47,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 199. [2022-10-17 10:45:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 152 states have internal predecessors, (154), 35 states have call successors, (35), 23 states have call predecessors, (35), 22 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2022-10-17 10:45:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2022-10-17 10:45:47,371 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 95 [2022-10-17 10:45:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:47,371 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2022-10-17 10:45:47,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-10-17 10:45:47,372 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2022-10-17 10:45:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-10-17 10:45:47,374 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:47,374 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:47,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-10-17 10:45:47,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-17 10:45:47,575 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash -939543350, now seen corresponding path program 10 times [2022-10-17 10:45:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:47,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660002949] [2022-10-17 10:45:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:47,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:47,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984884743] [2022-10-17 10:45:47,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 10:45:47,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:47,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:47,602 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:47,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-10-17 10:45:47,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 10:45:47,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:47,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 48 conjunts are in the unsatisfiable core [2022-10-17 10:45:47,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-10-17 10:45:48,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:48,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660002949] [2022-10-17 10:45:48,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:48,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984884743] [2022-10-17 10:45:48,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984884743] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:48,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:48,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-10-17 10:45:48,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211096006] [2022-10-17 10:45:48,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:48,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:45:48,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:48,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:45:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:45:48,256 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-17 10:45:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:48,871 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2022-10-17 10:45:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:45:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 101 [2022-10-17 10:45:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:48,874 INFO L225 Difference]: With dead ends: 204 [2022-10-17 10:45:48,874 INFO L226 Difference]: Without dead ends: 198 [2022-10-17 10:45:48,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-10-17 10:45:48,876 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:48,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 509 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:45:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-10-17 10:45:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-10-17 10:45:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 141 states have (on average 1.0851063829787233) internal successors, (153), 151 states have internal predecessors, (153), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (33), 23 states have call predecessors, (33), 33 states have call successors, (33) [2022-10-17 10:45:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2022-10-17 10:45:48,922 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 101 [2022-10-17 10:45:48,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:48,923 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2022-10-17 10:45:48,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-17 10:45:48,923 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2022-10-17 10:45:48,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-10-17 10:45:48,924 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:48,924 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:48,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:49,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:49,125 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:49,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1584846500, now seen corresponding path program 11 times [2022-10-17 10:45:49,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:49,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376824694] [2022-10-17 10:45:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:49,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:49,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:49,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111596663] [2022-10-17 10:45:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-10-17 10:45:49,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:49,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:49,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-10-17 10:45:51,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-10-17 10:45:51,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:45:51,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 52 conjunts are in the unsatisfiable core [2022-10-17 10:45:51,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:45:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-10-17 10:45:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:45:52,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:45:52,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376824694] [2022-10-17 10:45:52,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:45:52,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111596663] [2022-10-17 10:45:52,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111596663] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:45:52,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:45:52,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-10-17 10:45:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817441662] [2022-10-17 10:45:52,591 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:45:52,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:45:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:45:52,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:45:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:45:52,593 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:45:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:45:53,214 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2022-10-17 10:45:53,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 10:45:53,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2022-10-17 10:45:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:45:53,217 INFO L225 Difference]: With dead ends: 203 [2022-10-17 10:45:53,217 INFO L226 Difference]: Without dead ends: 197 [2022-10-17 10:45:53,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:45:53,219 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:45:53,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 575 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:45:53,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-10-17 10:45:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-10-17 10:45:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 150 states have internal predecessors, (152), 33 states have call successors, (33), 23 states have call predecessors, (33), 22 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2022-10-17 10:45:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 217 transitions. [2022-10-17 10:45:53,268 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 217 transitions. Word has length 109 [2022-10-17 10:45:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:45:53,269 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 217 transitions. [2022-10-17 10:45:53,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:45:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 217 transitions. [2022-10-17 10:45:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-10-17 10:45:53,271 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:45:53,271 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:45:53,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-10-17 10:45:53,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-17 10:45:53,475 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:45:53,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:45:53,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1568440706, now seen corresponding path program 12 times [2022-10-17 10:45:53,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:45:53,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376102949] [2022-10-17 10:45:53,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:45:53,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:45:53,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:45:53,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471709050] [2022-10-17 10:45:53,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-10-17 10:45:53,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:45:53,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:45:53,501 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:45:53,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dd78dbd-7986-4ad6-b1ee-6fcce50ed5f7/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process