./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R --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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- 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-38b53e6 [2022-11-25 17:40:32,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:40:32,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:40:32,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:40:32,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:40:32,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:40:32,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:40:32,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:40:32,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:40:32,204 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:40:32,206 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:40:32,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:40:32,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:40:32,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:40:32,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:40:32,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:40:32,218 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:40:32,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:40:32,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:40:32,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:40:32,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:40:32,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:40:32,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:40:32,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:40:32,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:40:32,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:40:32,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:40:32,261 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:40:32,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:40:32,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:40:32,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:40:32,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:40:32,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:40:32,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:40:32,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:40:32,270 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:40:32,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:40:32,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:40:32,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:40:32,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:40:32,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:40:32,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:40:32,317 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:40:32,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:40:32,319 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:40:32,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:40:32,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:40:32,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:40:32,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:40:32,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:40:32,322 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:40:32,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:40:32,323 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:40:32,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:40:32,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:40:32,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:40:32,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:40:32,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:40:32,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:40:32,325 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:40:32,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:40:32,326 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:40:32,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:40:32,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:40:32,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:40:32,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:40:32,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:40:32,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:40:32,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:40:32,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:40:32,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:40:32,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:40:32,329 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:40:32,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:40:32,329 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:40:32,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:40:32,330 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2022-11-25 17:40:32,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:40:32,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:40:32,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:40:32,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:40:32,700 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:40:32,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-11-25 17:40:36,205 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:40:36,448 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:40:36,449 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2022-11-25 17:40:36,458 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/data/aab0bf52f/48e734241d4f4d1d86ee34ac4ebfd5be/FLAG1ae908401 [2022-11-25 17:40:36,479 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/data/aab0bf52f/48e734241d4f4d1d86ee34ac4ebfd5be [2022-11-25 17:40:36,482 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:40:36,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:40:36,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:40:36,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:40:36,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:40:36,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3759d122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36, skipping insertion in model container [2022-11-25 17:40:36,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:40:36,539 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:40:36,763 WARN L237 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_e3722985-1602-4dc7-a9d7-ef0410735a03/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2022-11-25 17:40:36,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:40:36,800 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:40:36,815 WARN L237 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_e3722985-1602-4dc7-a9d7-ef0410735a03/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2022-11-25 17:40:36,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:40:36,843 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:40:36,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36 WrapperNode [2022-11-25 17:40:36,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:40:36,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:40:36,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:40:36,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:40:36,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,861 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,882 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-11-25 17:40:36,882 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:40:36,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:40:36,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:40:36,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:40:36,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,901 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,907 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:40:36,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:40:36,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:40:36,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:40:36,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (1/1) ... [2022-11-25 17:40:36,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:40:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:36,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:40:36,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:40:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:40:37,013 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 17:40:37,014 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 17:40:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:40:37,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:40:37,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:40:37,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:40:37,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:40:37,103 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:40:37,106 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:40:37,332 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:40:37,345 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:40:37,347 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 17:40:37,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:40:37 BoogieIcfgContainer [2022-11-25 17:40:37,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:40:37,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:40:37,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:40:37,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:40:37,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:40:36" (1/3) ... [2022-11-25 17:40:37,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebf382d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:40:37, skipping insertion in model container [2022-11-25 17:40:37,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:40:36" (2/3) ... [2022-11-25 17:40:37,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ebf382d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:40:37, skipping insertion in model container [2022-11-25 17:40:37,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:40:37" (3/3) ... [2022-11-25 17:40:37,365 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2022-11-25 17:40:37,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:40:37,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:40:37,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:40:37,490 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;@53caf8e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:40:37,491 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:40:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:40:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:40:37,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:37,513 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:37,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-11-25 17:40:37,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:37,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974920940] [2022-11-25 17:40:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:37,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974920940] [2022-11-25 17:40:37,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:40:37,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613200316] [2022-11-25 17:40:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:37,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:37,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:37,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:37,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:40:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:37,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:40:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 17:40:37,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:40:37,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613200316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:37,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:37,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:40:37,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582565819] [2022-11-25 17:40:37,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:37,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:40:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:37,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:40:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:40:37,915 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:40:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:37,998 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-11-25 17:40:38,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:40:38,001 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-25 17:40:38,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:38,013 INFO L225 Difference]: With dead ends: 67 [2022-11-25 17:40:38,013 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 17:40:38,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:40:38,032 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:40:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 17:40:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 17:40:38,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:40:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-25 17:40:38,087 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-11-25 17:40:38,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:38,088 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-25 17:40:38,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:40:38,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-25 17:40:38,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:40:38,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:38,092 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:38,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:40:38,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:40:38,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:38,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-11-25 17:40:38,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:38,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276911807] [2022-11-25 17:40:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:38,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:38,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:38,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447554421] [2022-11-25 17:40:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:38,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:38,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:38,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:40:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:40:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:40:38,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:40:38,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276911807] [2022-11-25 17:40:38,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:38,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447554421] [2022-11-25 17:40:38,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447554421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:38,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:38,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:40:38,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630275224] [2022-11-25 17:40:38,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:38,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:40:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:40:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:40:38,699 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:40:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:38,931 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-25 17:40:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:40:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-25 17:40:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:38,934 INFO L225 Difference]: With dead ends: 50 [2022-11-25 17:40:38,934 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:40:38,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:40:38,937 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:38,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:40:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:40:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-25 17:40:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:40:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-25 17:40:38,952 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-11-25 17:40:38,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:38,953 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-25 17:40:38,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:40:38,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-25 17:40:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 17:40:38,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:38,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:38,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:39,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 17:40:39,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:39,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-11-25 17:40:39,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:39,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705273938] [2022-11-25 17:40:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:39,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:39,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:39,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350016324] [2022-11-25 17:40:39,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:39,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:39,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:39,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:40:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:40:39,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:40:39,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:40:39,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705273938] [2022-11-25 17:40:39,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:39,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350016324] [2022-11-25 17:40:39,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350016324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:39,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:39,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:40:39,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749189862] [2022-11-25 17:40:39,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:39,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:40:39,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:40:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:40:39,511 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:40:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:39,666 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-25 17:40:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:40:39,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-25 17:40:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:39,669 INFO L225 Difference]: With dead ends: 49 [2022-11-25 17:40:39,669 INFO L226 Difference]: Without dead ends: 47 [2022-11-25 17:40:39,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:40:39,671 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:39,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:40:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-25 17:40:39,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-25 17:40:39,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 17:40:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-25 17:40:39,726 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-11-25 17:40:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:39,727 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-25 17:40:39,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:40:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-25 17:40:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 17:40:39,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:39,732 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:39,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:39,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:39,933 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-11-25 17:40:39,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:39,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157676137] [2022-11-25 17:40:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:39,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:39,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046988341] [2022-11-25 17:40:39,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:39,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:39,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:39,991 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:39,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:40:40,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:40,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:40:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:40:40,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:40:40,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:40,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157676137] [2022-11-25 17:40:40,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:40,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046988341] [2022-11-25 17:40:40,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046988341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:40,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:40:40,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-25 17:40:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307376174] [2022-11-25 17:40:40,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:40,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:40:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:40,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:40:40,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:40:40,358 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:40:40,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:40,705 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-11-25 17:40:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:40:40,706 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-25 17:40:40,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:40,707 INFO L225 Difference]: With dead ends: 99 [2022-11-25 17:40:40,708 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 17:40:40,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:40:40,709 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:40,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:40:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 17:40:40,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-11-25 17:40:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 17:40:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-25 17:40:40,731 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-11-25 17:40:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:40,732 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-25 17:40:40,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:40:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-25 17:40:40,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 17:40:40,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:40,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:40,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:40,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:40,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:40,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-11-25 17:40:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:40,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698106725] [2022-11-25 17:40:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:40,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:40,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563517774] [2022-11-25 17:40:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:40,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:40,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:40,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:40:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:40:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:40:41,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:41,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698106725] [2022-11-25 17:40:41,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:41,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563517774] [2022-11-25 17:40:41,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563517774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:41,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:40:41,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-25 17:40:41,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877358876] [2022-11-25 17:40:41,298 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:41,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:40:41,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:41,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:40:41,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:40:41,300 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:40:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:41,474 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-11-25 17:40:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:40:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-25 17:40:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:41,476 INFO L225 Difference]: With dead ends: 75 [2022-11-25 17:40:41,477 INFO L226 Difference]: Without dead ends: 73 [2022-11-25 17:40:41,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:40:41,478 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:41,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:40:41,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-25 17:40:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-25 17:40:41,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 17:40:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-25 17:40:41,496 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-11-25 17:40:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:41,497 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-25 17:40:41,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 17:40:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-25 17:40:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 17:40:41,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:41,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:41,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:41,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-11-25 17:40:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87268366] [2022-11-25 17:40:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:41,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:41,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470096773] [2022-11-25 17:40:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:41,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:41,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:41,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:40:41,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:41,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:40:41,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 17:40:42,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:40:42,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:42,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87268366] [2022-11-25 17:40:42,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:42,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470096773] [2022-11-25 17:40:42,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470096773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:42,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:40:42,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-25 17:40:42,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616815552] [2022-11-25 17:40:42,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:42,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:40:42,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:40:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:40:42,311 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 17:40:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:42,630 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-11-25 17:40:42,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:40:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2022-11-25 17:40:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:42,633 INFO L225 Difference]: With dead ends: 107 [2022-11-25 17:40:42,633 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 17:40:42,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:40:42,635 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:42,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 259 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:40:42,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 17:40:42,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-25 17:40:42,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 17:40:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2022-11-25 17:40:42,662 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2022-11-25 17:40:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:42,663 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2022-11-25 17:40:42,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 17:40:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2022-11-25 17:40:42,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:40:42,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:42,665 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:42,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:40:42,873 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:42,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:42,873 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-11-25 17:40:42,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:42,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381301750] [2022-11-25 17:40:42,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:42,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:42,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:42,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745059494] [2022-11-25 17:40:42,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:42,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:42,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:42,912 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:42,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:40:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:40:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:40:43,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381301750] [2022-11-25 17:40:47,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:47,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745059494] [2022-11-25 17:40:47,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745059494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:47,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:40:47,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-25 17:40:47,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828770367] [2022-11-25 17:40:47,755 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:47,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:40:47,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:40:47,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2022-11-25 17:40:47,757 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:40:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:48,216 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2022-11-25 17:40:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:40:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-25 17:40:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:48,218 INFO L225 Difference]: With dead ends: 114 [2022-11-25 17:40:48,219 INFO L226 Difference]: Without dead ends: 112 [2022-11-25 17:40:48,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2022-11-25 17:40:48,220 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 36 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:48,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 133 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:40:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-25 17:40:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-11-25 17:40:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 17:40:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2022-11-25 17:40:48,257 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 43 [2022-11-25 17:40:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:48,257 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2022-11-25 17:40:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 17:40:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2022-11-25 17:40:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:40:48,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:48,260 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:48,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:48,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:48,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:48,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:48,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-11-25 17:40:48,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:48,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500728318] [2022-11-25 17:40:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:48,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:48,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:48,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105277271] [2022-11-25 17:40:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:48,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:48,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:48,515 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:40:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:48,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 17:40:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:40:49,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:40:49,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:49,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500728318] [2022-11-25 17:40:49,630 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:49,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105277271] [2022-11-25 17:40:49,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105277271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:40:49,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:40:49,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-25 17:40:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574967348] [2022-11-25 17:40:49,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:40:49,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:40:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:40:49,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:40:49,633 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 17:40:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:55,411 INFO L93 Difference]: Finished difference Result 182 states and 255 transitions. [2022-11-25 17:40:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:40:55,411 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-25 17:40:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:55,415 INFO L225 Difference]: With dead ends: 182 [2022-11-25 17:40:55,415 INFO L226 Difference]: Without dead ends: 180 [2022-11-25 17:40:55,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 17:40:55,422 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 155 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:55,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 201 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-25 17:40:55,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-25 17:40:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 141. [2022-11-25 17:40:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-25 17:40:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 191 transitions. [2022-11-25 17:40:55,490 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 191 transitions. Word has length 43 [2022-11-25 17:40:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:55,491 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 191 transitions. [2022-11-25 17:40:55,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 17:40:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 191 transitions. [2022-11-25 17:40:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 17:40:55,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:55,493 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:55,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:55,700 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-11-25 17:40:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:55,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187097160] [2022-11-25 17:40:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:55,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:55,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366541829] [2022-11-25 17:40:55,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:40:55,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:55,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:55,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:40:55,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:40:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:40:55,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:40:55,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:40:55,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:40:55,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:55,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187097160] [2022-11-25 17:40:55,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:55,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366541829] [2022-11-25 17:40:55,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366541829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:40:55,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:40:55,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:40:55,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291777487] [2022-11-25 17:40:55,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:40:55,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:40:55,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:40:55,873 INFO L87 Difference]: Start difference. First operand 141 states and 191 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:40:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:56,079 INFO L93 Difference]: Finished difference Result 195 states and 270 transitions. [2022-11-25 17:40:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:40:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-25 17:40:56,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:56,082 INFO L225 Difference]: With dead ends: 195 [2022-11-25 17:40:56,082 INFO L226 Difference]: Without dead ends: 132 [2022-11-25 17:40:56,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:40:56,090 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:56,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:40:56,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-25 17:40:56,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 97. [2022-11-25 17:40:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.171875) internal successors, (75), 67 states have internal predecessors, (75), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 17:40:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 124 transitions. [2022-11-25 17:40:56,181 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 124 transitions. Word has length 43 [2022-11-25 17:40:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:56,181 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 124 transitions. [2022-11-25 17:40:56,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 17:40:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 124 transitions. [2022-11-25 17:40:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:40:56,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:56,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:56,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:56,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:56,395 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:56,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-11-25 17:40:56,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:56,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959041860] [2022-11-25 17:40:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:56,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:56,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:56,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604843936] [2022-11-25 17:40:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:56,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:56,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:56,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:40:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:40:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:40:56,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:40:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:40:57,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:40:57,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959041860] [2022-11-25 17:40:57,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:40:57,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604843936] [2022-11-25 17:40:57,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604843936] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:40:57,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:40:57,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-25 17:40:57,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258854856] [2022-11-25 17:40:57,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:40:57,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:40:57,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:40:57,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:40:57,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:40:57,139 INFO L87 Difference]: Start difference. First operand 97 states and 124 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:40:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:40:57,253 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2022-11-25 17:40:57,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:40:57,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-11-25 17:40:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:40:57,255 INFO L225 Difference]: With dead ends: 103 [2022-11-25 17:40:57,256 INFO L226 Difference]: Without dead ends: 101 [2022-11-25 17:40:57,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:40:57,257 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:40:57,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:40:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-25 17:40:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-25 17:40:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.164179104477612) internal successors, (78), 70 states have internal predecessors, (78), 25 states have call successors, (25), 8 states have call predecessors, (25), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 17:40:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 127 transitions. [2022-11-25 17:40:57,301 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 127 transitions. Word has length 48 [2022-11-25 17:40:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:40:57,302 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 127 transitions. [2022-11-25 17:40:57,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 17:40:57,302 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 127 transitions. [2022-11-25 17:40:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 17:40:57,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:40:57,303 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:40:57,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:40:57,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:40:57,510 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:40:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:40:57,511 INFO L85 PathProgramCache]: Analyzing trace with hash 145642443, now seen corresponding path program 1 times [2022-11-25 17:40:57,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:40:57,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254891462] [2022-11-25 17:40:57,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:40:57,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:40:57,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197561807] [2022-11-25 17:40:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:40:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:40:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:40:57,526 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:40:57,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:40:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:40:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:40:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:40:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:40:58,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:02,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254891462] [2022-11-25 17:41:02,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:41:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197561807] [2022-11-25 17:41:02,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197561807] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:41:02,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:41:02,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-25 17:41:02,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864575633] [2022-11-25 17:41:02,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:02,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:41:02,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:02,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:41:02,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2022-11-25 17:41:02,337 INFO L87 Difference]: Start difference. First operand 101 states and 127 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:41:03,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:41:03,390 INFO L93 Difference]: Finished difference Result 150 states and 200 transitions. [2022-11-25 17:41:03,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:41:03,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-11-25 17:41:03,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:41:03,393 INFO L225 Difference]: With dead ends: 150 [2022-11-25 17:41:03,393 INFO L226 Difference]: Without dead ends: 148 [2022-11-25 17:41:03,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=92, Invalid=459, Unknown=1, NotChecked=0, Total=552 [2022-11-25 17:41:03,395 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 60 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:41:03,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 17:41:03,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-25 17:41:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 111. [2022-11-25 17:41:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 75 states have internal predecessors, (84), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 17:41:03,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2022-11-25 17:41:03,448 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 48 [2022-11-25 17:41:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:41:03,450 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2022-11-25 17:41:03,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-25 17:41:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2022-11-25 17:41:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 17:41:03,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:03,452 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:03,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:41:03,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:03,660 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-11-25 17:41:03,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:03,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799854385] [2022-11-25 17:41:03,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:03,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:41:03,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12971918] [2022-11-25 17:41:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:03,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:03,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:03,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:41:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 17:41:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 17:41:05,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 17:41:07,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799854385] [2022-11-25 17:41:07,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:41:07,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12971918] [2022-11-25 17:41:07,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12971918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:07,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:41:07,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2022-11-25 17:41:07,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385850667] [2022-11-25 17:41:07,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:07,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:41:07,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:07,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:41:07,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:41:07,472 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 17:41:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:41:26,466 INFO L93 Difference]: Finished difference Result 311 states and 429 transitions. [2022-11-25 17:41:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 17:41:26,467 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 60 [2022-11-25 17:41:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:41:26,469 INFO L225 Difference]: With dead ends: 311 [2022-11-25 17:41:26,470 INFO L226 Difference]: Without dead ends: 239 [2022-11-25 17:41:26,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 17:41:26,472 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 147 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:41:26,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 228 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-11-25 17:41:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-25 17:41:26,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 186. [2022-11-25 17:41:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 124 states have internal predecessors, (146), 49 states have call successors, (49), 13 states have call predecessors, (49), 13 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-25 17:41:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 243 transitions. [2022-11-25 17:41:26,583 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 243 transitions. Word has length 60 [2022-11-25 17:41:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:41:26,584 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 243 transitions. [2022-11-25 17:41:26,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 17:41:26,584 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 243 transitions. [2022-11-25 17:41:26,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 17:41:26,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:41:26,585 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:41:26,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:41:26,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:26,792 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:41:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:41:26,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-11-25 17:41:26,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:41:26,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750264761] [2022-11-25 17:41:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:26,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:41:26,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:41:26,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872151449] [2022-11-25 17:41:26,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:41:26,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:41:26,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:41:26,824 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:41:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:41:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:41:26,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:41:26,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:41:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 17:41:28,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:41:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 17:41:28,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:41:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750264761] [2022-11-25 17:41:28,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:41:28,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872151449] [2022-11-25 17:41:28,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872151449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:41:28,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:41:28,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-25 17:41:28,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152900893] [2022-11-25 17:41:28,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:41:28,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:41:28,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:41:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:41:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:41:28,974 INFO L87 Difference]: Start difference. First operand 186 states and 243 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 17:42:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:02,999 INFO L93 Difference]: Finished difference Result 304 states and 420 transitions. [2022-11-25 17:42:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:42:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2022-11-25 17:42:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:03,003 INFO L225 Difference]: With dead ends: 304 [2022-11-25 17:42:03,004 INFO L226 Difference]: Without dead ends: 302 [2022-11-25 17:42:03,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 17:42:03,011 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 137 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:42:03,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 401 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-11-25 17:42:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-25 17:42:03,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 194. [2022-11-25 17:42:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 129 states have (on average 1.178294573643411) internal successors, (152), 130 states have internal predecessors, (152), 49 states have call successors, (49), 15 states have call predecessors, (49), 15 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-11-25 17:42:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2022-11-25 17:42:03,150 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 249 transitions. Word has length 68 [2022-11-25 17:42:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:03,150 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 249 transitions. [2022-11-25 17:42:03,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 17:42:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 249 transitions. [2022-11-25 17:42:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 17:42:03,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:03,152 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:03,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-25 17:42:03,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:03,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:03,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2022-11-25 17:42:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:03,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038567217] [2022-11-25 17:42:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:03,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:03,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:42:03,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72351451] [2022-11-25 17:42:03,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:42:03,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:03,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:03,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:03,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:42:03,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:42:03,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:03,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 17:42:03,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 17:42:03,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:42:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038567217] [2022-11-25 17:42:03,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:42:03,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72351451] [2022-11-25 17:42:03,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72351451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:03,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:03,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:42:03,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315807142] [2022-11-25 17:42:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:03,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:42:03,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:42:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:42:03,519 INFO L87 Difference]: Start difference. First operand 194 states and 249 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 17:42:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:03,742 INFO L93 Difference]: Finished difference Result 338 states and 446 transitions. [2022-11-25 17:42:03,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:42:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2022-11-25 17:42:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:03,744 INFO L225 Difference]: With dead ends: 338 [2022-11-25 17:42:03,745 INFO L226 Difference]: Without dead ends: 232 [2022-11-25 17:42:03,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:42:03,746 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 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 [2022-11-25 17:42:03,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:42:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-25 17:42:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 218. [2022-11-25 17:42:03,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 138 states have internal predecessors, (161), 65 states have call successors, (65), 15 states have call predecessors, (65), 15 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-11-25 17:42:03,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 290 transitions. [2022-11-25 17:42:03,884 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 290 transitions. Word has length 73 [2022-11-25 17:42:03,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:03,884 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 290 transitions. [2022-11-25 17:42:03,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 17:42:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 290 transitions. [2022-11-25 17:42:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 17:42:03,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:03,888 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:03,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:04,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:42:04,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:04,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1419603609, now seen corresponding path program 3 times [2022-11-25 17:42:04,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012108270] [2022-11-25 17:42:04,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:04,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:04,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:42:04,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452757277] [2022-11-25 17:42:04,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:42:04,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:04,121 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:04,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:42:04,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:42:04,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:04,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:42:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-25 17:42:04,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:42:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012108270] [2022-11-25 17:42:04,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:42:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452757277] [2022-11-25 17:42:04,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452757277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:42:04,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:42:04,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:42:04,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697314703] [2022-11-25 17:42:04,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:42:04,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:42:04,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:42:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:42:04,307 INFO L87 Difference]: Start difference. First operand 218 states and 290 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 17:42:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:04,630 INFO L93 Difference]: Finished difference Result 245 states and 331 transitions. [2022-11-25 17:42:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:42:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 73 [2022-11-25 17:42:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:04,633 INFO L225 Difference]: With dead ends: 245 [2022-11-25 17:42:04,634 INFO L226 Difference]: Without dead ends: 243 [2022-11-25 17:42:04,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:42:04,635 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:42:04,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 151 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:42:04,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-25 17:42:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 240. [2022-11-25 17:42:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 147 states have internal predecessors, (173), 77 states have call successors, (77), 16 states have call predecessors, (77), 16 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-11-25 17:42:04,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2022-11-25 17:42:04,800 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 73 [2022-11-25 17:42:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:04,801 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2022-11-25 17:42:04,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-25 17:42:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2022-11-25 17:42:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 17:42:04,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:04,803 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:04,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:05,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:42:05,009 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 4 times [2022-11-25 17:42:05,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:05,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690870344] [2022-11-25 17:42:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:05,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:05,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:42:05,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210776086] [2022-11-25 17:42:05,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:42:05,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:05,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:05,037 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:05,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:42:05,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:42:05,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:42:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 17:42:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:42:06,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-25 17:42:07,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:07,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690870344] [2022-11-25 17:42:07,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:42:07,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210776086] [2022-11-25 17:42:07,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210776086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:07,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:42:07,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2022-11-25 17:42:07,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920226424] [2022-11-25 17:42:07,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:07,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 17:42:07,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:07,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 17:42:07,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:42:07,721 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-25 17:42:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:42:40,163 INFO L93 Difference]: Finished difference Result 367 states and 503 transitions. [2022-11-25 17:42:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 17:42:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2022-11-25 17:42:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:42:40,167 INFO L225 Difference]: With dead ends: 367 [2022-11-25 17:42:40,167 INFO L226 Difference]: Without dead ends: 365 [2022-11-25 17:42:40,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 17:42:40,169 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 231 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:42:40,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 478 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2022-11-25 17:42:40,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-25 17:42:40,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 312. [2022-11-25 17:42:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 190 states have (on average 1.1894736842105262) internal successors, (226), 191 states have internal predecessors, (226), 101 states have call successors, (101), 20 states have call predecessors, (101), 20 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-25 17:42:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 427 transitions. [2022-11-25 17:42:40,417 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 427 transitions. Word has length 73 [2022-11-25 17:42:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:42:40,418 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 427 transitions. [2022-11-25 17:42:40,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 24 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-25 17:42:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 427 transitions. [2022-11-25 17:42:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 17:42:40,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:42:40,420 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:42:40,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:42:40,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:42:40,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:42:40,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:42:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2022-11-25 17:42:40,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:42:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893317422] [2022-11-25 17:42:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:40,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:42:40,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:42:40,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821179822] [2022-11-25 17:42:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:42:40,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:42:40,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:42:40,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:42:40,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:42:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:42:40,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-25 17:42:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:42:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-25 17:42:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:42:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-25 17:42:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:42:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893317422] [2022-11-25 17:42:45,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:42:45,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821179822] [2022-11-25 17:42:45,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821179822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:42:45,904 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:42:45,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-25 17:42:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957306677] [2022-11-25 17:42:45,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:42:45,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 17:42:45,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:42:45,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 17:42:45,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-25 17:42:45,907 INFO L87 Difference]: Start difference. First operand 312 states and 427 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-25 17:43:21,917 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:43:53,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:44:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:16,023 INFO L93 Difference]: Finished difference Result 506 states and 711 transitions. [2022-11-25 17:44:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-25 17:44:16,024 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2022-11-25 17:44:16,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:16,028 INFO L225 Difference]: With dead ends: 506 [2022-11-25 17:44:16,028 INFO L226 Difference]: Without dead ends: 498 [2022-11-25 17:44:16,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 69.1s TimeCoverageRelationStatistics Valid=1433, Invalid=7309, Unknown=0, NotChecked=0, Total=8742 [2022-11-25 17:44:16,032 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 310 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:16,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 700 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 2423 Invalid, 0 Unknown, 0 Unchecked, 23.9s Time] [2022-11-25 17:44:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-25 17:44:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 434. [2022-11-25 17:44:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 256 states have (on average 1.2109375) internal successors, (310), 257 states have internal predecessors, (310), 153 states have call successors, (153), 24 states have call predecessors, (153), 24 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2022-11-25 17:44:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 615 transitions. [2022-11-25 17:44:16,499 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 615 transitions. Word has length 87 [2022-11-25 17:44:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:16,499 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 615 transitions. [2022-11-25 17:44:16,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-25 17:44:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 615 transitions. [2022-11-25 17:44:16,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 17:44:16,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:44:16,502 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:16,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:16,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:44:16,715 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:44:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:16,716 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2022-11-25 17:44:16,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:16,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593710334] [2022-11-25 17:44:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:16,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:16,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:44:16,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319655053] [2022-11-25 17:44:16,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:44:16,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:44:16,737 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:44:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:44:16,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:44:16,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:44:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 17:44:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:44:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-25 17:44:18,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:44:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 17:44:22,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593710334] [2022-11-25 17:44:22,841 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:44:22,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319655053] [2022-11-25 17:44:22,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319655053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:44:22,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:44:22,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-25 17:44:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603638085] [2022-11-25 17:44:22,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:44:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 17:44:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 17:44:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:44:22,844 INFO L87 Difference]: Start difference. First operand 434 states and 615 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-25 17:45:05,148 WARN L233 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 85 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:45:24,696 WARN L233 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 80 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:45:39,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:01,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:01,657 INFO L93 Difference]: Finished difference Result 846 states and 1208 transitions. [2022-11-25 17:46:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 17:46:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 107 [2022-11-25 17:46:01,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:01,661 INFO L225 Difference]: With dead ends: 846 [2022-11-25 17:46:01,662 INFO L226 Difference]: Without dead ends: 667 [2022-11-25 17:46:01,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2848 ImplicationChecksByTransitivity, 69.5s TimeCoverageRelationStatistics Valid=1737, Invalid=7769, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 17:46:01,666 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 293 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 848 SdHoareTripleChecker+Invalid, 2957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:01,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 848 Invalid, 2957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 31.5s Time] [2022-11-25 17:46:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-11-25 17:46:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 565. [2022-11-25 17:46:02,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 327 states have (on average 1.2201834862385321) internal successors, (399), 328 states have internal predecessors, (399), 209 states have call successors, (209), 28 states have call predecessors, (209), 28 states have return successors, (208), 208 states have call predecessors, (208), 208 states have call successors, (208) [2022-11-25 17:46:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 816 transitions. [2022-11-25 17:46:02,463 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 816 transitions. Word has length 107 [2022-11-25 17:46:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:02,464 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 816 transitions. [2022-11-25 17:46:02,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-25 17:46:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 816 transitions. [2022-11-25 17:46:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 17:46:02,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:02,468 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:02,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:02,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:46:02,675 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1666306094, now seen corresponding path program 3 times [2022-11-25 17:46:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:02,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833018578] [2022-11-25 17:46:02,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:02,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:46:02,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702861111] [2022-11-25 17:46:02,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:46:02,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:02,723 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:02,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:46:02,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:46:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:02,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 17:46:02,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-25 17:46:04,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 17:46:09,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:09,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833018578] [2022-11-25 17:46:09,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:46:09,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702861111] [2022-11-25 17:46:09,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702861111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:09,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:09,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-25 17:46:09,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314204368] [2022-11-25 17:46:09,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:09,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 17:46:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 17:46:09,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-11-25 17:46:09,750 INFO L87 Difference]: Start difference. First operand 565 states and 816 transitions. Second operand has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-25 17:46:20,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:30,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:36,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:45,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:49,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:54,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:46:57,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:47:07,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:47:11,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:47:15,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:47:24,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:47:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:47:33,392 INFO L93 Difference]: Finished difference Result 929 states and 1374 transitions. [2022-11-25 17:47:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-25 17:47:33,393 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2022-11-25 17:47:33,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:47:33,398 INFO L225 Difference]: With dead ends: 929 [2022-11-25 17:47:33,399 INFO L226 Difference]: Without dead ends: 924 [2022-11-25 17:47:33,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2990 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=1765, Invalid=9155, Unknown=0, NotChecked=0, Total=10920 [2022-11-25 17:47:33,404 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 435 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 789 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 3953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:47:33,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 1021 Invalid, 3953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 3155 Invalid, 9 Unknown, 0 Unchecked, 53.1s Time] [2022-11-25 17:47:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-11-25 17:47:34,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 694. [2022-11-25 17:47:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 399 states have (on average 1.2280701754385965) internal successors, (490), 400 states have internal predecessors, (490), 261 states have call successors, (261), 33 states have call predecessors, (261), 33 states have return successors, (260), 260 states have call predecessors, (260), 260 states have call successors, (260) [2022-11-25 17:47:34,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1011 transitions. [2022-11-25 17:47:34,422 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1011 transitions. Word has length 112 [2022-11-25 17:47:34,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:47:34,423 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 1011 transitions. [2022-11-25 17:47:34,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-25 17:47:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1011 transitions. [2022-11-25 17:47:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 17:47:34,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:47:34,428 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:34,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:34,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:34,636 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:47:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash 74175480, now seen corresponding path program 1 times [2022-11-25 17:47:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:34,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125117257] [2022-11-25 17:47:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:34,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:47:34,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303359618] [2022-11-25 17:47:34,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:34,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:34,652 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:34,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:47:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:47:34,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 17:47:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 46 proven. 49 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-25 17:47:35,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 57 proven. 16 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-11-25 17:47:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125117257] [2022-11-25 17:47:35,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:47:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303359618] [2022-11-25 17:47:35,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303359618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:35,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:47:35,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2022-11-25 17:47:35,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610076140] [2022-11-25 17:47:35,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:35,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:47:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:35,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:47:35,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:47:35,700 INFO L87 Difference]: Start difference. First operand 694 states and 1011 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-25 17:47:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:47:46,144 INFO L93 Difference]: Finished difference Result 1149 states and 1717 transitions. [2022-11-25 17:47:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:47:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 125 [2022-11-25 17:47:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:47:46,152 INFO L225 Difference]: With dead ends: 1149 [2022-11-25 17:47:46,152 INFO L226 Difference]: Without dead ends: 1147 [2022-11-25 17:47:46,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=919, Invalid=4051, Unknown=0, NotChecked=0, Total=4970 [2022-11-25 17:47:46,155 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 173 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 941 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-25 17:47:46,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 941 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-25 17:47:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-25 17:47:47,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 979. [2022-11-25 17:47:47,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 542 states have (on average 1.2509225092250922) internal successors, (678), 543 states have internal predecessors, (678), 397 states have call successors, (397), 39 states have call predecessors, (397), 39 states have return successors, (396), 396 states have call predecessors, (396), 396 states have call successors, (396) [2022-11-25 17:47:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1471 transitions. [2022-11-25 17:47:47,923 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1471 transitions. Word has length 125 [2022-11-25 17:47:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:47:47,924 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1471 transitions. [2022-11-25 17:47:47,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 22 states have internal predecessors, (63), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-25 17:47:47,924 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1471 transitions. [2022-11-25 17:47:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 17:47:47,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:47:47,928 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:47:47,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:47:48,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:48,135 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:47:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:47:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 2 times [2022-11-25 17:47:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:47:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115500356] [2022-11-25 17:47:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:47:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:47:48,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:47:48,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119644305] [2022-11-25 17:47:48,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:47:48,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:47:48,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:47:48,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:47:48,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:47:48,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:47:48,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-25 17:47:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-11-25 17:47:50,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-11-25 17:47:53,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:47:53,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115500356] [2022-11-25 17:47:53,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:47:53,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119644305] [2022-11-25 17:47:53,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119644305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:47:53,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:47:53,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 40 [2022-11-25 17:47:53,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93900958] [2022-11-25 17:47:53,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:47:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 17:47:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:47:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 17:47:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:47:53,757 INFO L87 Difference]: Start difference. First operand 979 states and 1471 transitions. Second operand has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-25 17:48:01,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:03,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:06,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:08,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:10,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:11,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:19,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:48:25,674 INFO L93 Difference]: Finished difference Result 1163 states and 1746 transitions. [2022-11-25 17:48:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-25 17:48:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 125 [2022-11-25 17:48:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:48:25,682 INFO L225 Difference]: With dead ends: 1163 [2022-11-25 17:48:25,682 INFO L226 Difference]: Without dead ends: 1159 [2022-11-25 17:48:25,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=863, Invalid=3559, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 17:48:25,686 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 253 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1913 mSolverCounterSat, 332 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1913 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:48:25,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 416 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1913 Invalid, 3 Unknown, 0 Unchecked, 20.4s Time] [2022-11-25 17:48:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-11-25 17:48:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1149. [2022-11-25 17:48:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 639 states have (on average 1.2472613458528952) internal successors, (797), 642 states have internal predecessors, (797), 468 states have call successors, (468), 42 states have call predecessors, (468), 41 states have return successors, (467), 464 states have call predecessors, (467), 467 states have call successors, (467) [2022-11-25 17:48:27,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1732 transitions. [2022-11-25 17:48:27,572 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1732 transitions. Word has length 125 [2022-11-25 17:48:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:48:27,573 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1732 transitions. [2022-11-25 17:48:27,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.289473684210526) internal successors, (87), 36 states have internal predecessors, (87), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-25 17:48:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1732 transitions. [2022-11-25 17:48:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 17:48:27,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:48:27,576 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:27,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-25 17:48:27,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:48:27,776 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:48:27,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:27,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1192369783, now seen corresponding path program 4 times [2022-11-25 17:48:27,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:27,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366991333] [2022-11-25 17:48:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:27,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:27,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:48:27,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759434630] [2022-11-25 17:48:27,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:48:27,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:48:27,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:48:27,788 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:48:27,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:48:27,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:48:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:48:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-25 17:48:27,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:48:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 76 proven. 66 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-11-25 17:48:29,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:48:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 70 proven. 63 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-11-25 17:48:38,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366991333] [2022-11-25 17:48:38,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:48:38,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759434630] [2022-11-25 17:48:38,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759434630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:48:38,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:48:38,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2022-11-25 17:48:38,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334423632] [2022-11-25 17:48:38,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:48:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 17:48:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 17:48:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 17:48:38,407 INFO L87 Difference]: Start difference. First operand 1149 states and 1732 transitions. Second operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-11-25 17:48:55,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:48:58,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:49:04,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:49:12,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:49:29,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:50:04,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:50:20,622 WARN L233 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 104 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 17:50:44,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:51:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:51:11,240 INFO L93 Difference]: Finished difference Result 1618 states and 2475 transitions. [2022-11-25 17:51:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-11-25 17:51:11,241 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 134 [2022-11-25 17:51:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:51:11,248 INFO L225 Difference]: With dead ends: 1618 [2022-11-25 17:51:11,248 INFO L226 Difference]: Without dead ends: 1612 [2022-11-25 17:51:11,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4271 ImplicationChecksByTransitivity, 95.0s TimeCoverageRelationStatistics Valid=2418, Invalid=12102, Unknown=0, NotChecked=0, Total=14520 [2022-11-25 17:51:11,253 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 399 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 3999 mSolverCounterSat, 1119 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 5123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 3999 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.9s IncrementalHoareTripleChecker+Time [2022-11-25 17:51:11,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 572 Invalid, 5123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 3999 Invalid, 5 Unknown, 0 Unchecked, 59.9s Time] [2022-11-25 17:51:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2022-11-25 17:51:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1422. [2022-11-25 17:51:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 786 states have (on average 1.2544529262086515) internal successors, (986), 789 states have internal predecessors, (986), 588 states have call successors, (588), 48 states have call predecessors, (588), 47 states have return successors, (587), 584 states have call predecessors, (587), 587 states have call successors, (587) [2022-11-25 17:51:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 2161 transitions. [2022-11-25 17:51:14,815 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 2161 transitions. Word has length 134 [2022-11-25 17:51:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:51:14,815 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 2161 transitions. [2022-11-25 17:51:14,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2022-11-25 17:51:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 2161 transitions. [2022-11-25 17:51:14,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-25 17:51:14,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:51:14,820 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:51:14,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 17:51:15,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:15,033 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:51:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:51:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash 54025799, now seen corresponding path program 5 times [2022-11-25 17:51:15,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:51:15,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288038848] [2022-11-25 17:51:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:51:15,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:51:15,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:51:15,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1419555050] [2022-11-25 17:51:15,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:51:15,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:51:15,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:51:15,047 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:51:15,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3722985-1602-4dc7-a9d7-ef0410735a03/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:51:15,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-25 17:51:15,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:51:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-25 17:51:15,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:51:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 53 proven. 177 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-25 17:51:19,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:51:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 78 proven. 139 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-11-25 17:51:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:51:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288038848] [2022-11-25 17:51:28,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:51:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419555050] [2022-11-25 17:51:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419555050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:51:28,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:51:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 39 [2022-11-25 17:51:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333965121] [2022-11-25 17:51:28,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:51:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 17:51:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:51:28,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 17:51:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 17:51:28,780 INFO L87 Difference]: Start difference. First operand 1422 states and 2161 transitions. Second operand has 39 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 14 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 12 states have call successors, (38) [2022-11-25 17:52:02,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:52:08,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:52:11,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:52:17,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:52:21,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:52:23,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:52:45,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:53:00,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:53:13,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:53:27,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:53:33,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:53:48,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:53:50,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:02,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:08,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:10,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:13,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:14,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:22,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:32,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:38,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:40,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:42,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:44,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:54:46,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:55:16,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 17:55:27,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []