./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2018/Problem11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2018/Problem11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN --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 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e --- 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-6b4ec56 [2022-11-20 10:50:25,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:50:25,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:50:25,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:50:25,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:50:25,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:50:25,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:50:25,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:50:25,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:50:25,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:50:25,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:50:25,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:50:25,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:50:25,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:50:25,229 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:50:25,231 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:50:25,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:50:25,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:50:25,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:50:25,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:50:25,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:50:25,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:50:25,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:50:25,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:50:25,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:50:25,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:50:25,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:50:25,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:50:25,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:50:25,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:50:25,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:50:25,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:50:25,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:50:25,272 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:50:25,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:50:25,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:50:25,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:50:25,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:50:25,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:50:25,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:50:25,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:50:25,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:50:25,322 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:50:25,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:50:25,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:50:25,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:50:25,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:50:25,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:50:25,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:50:25,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:50:25,326 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:50:25,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:50:25,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:50:25,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:50:25,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:50:25,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:50:25,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:50:25,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:50:25,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:50:25,329 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:50:25,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:50:25,329 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:50:25,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:50:25,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:50:25,330 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:50:25,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:50:25,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:25,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:50:25,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:50:25,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:50:25,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:50:25,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:50:25,332 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:50:25,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:50:25,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:50:25,333 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 940624650400628fbc547d76c7cce642a9063fb1576962b71733623b165f113e [2022-11-20 10:50:25,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:50:25,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:50:25,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:50:25,712 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:50:25,713 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:50:25,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/eca-rers2018/Problem11.c [2022-11-20 10:50:28,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:50:29,296 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:50:29,298 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/sv-benchmarks/c/eca-rers2018/Problem11.c [2022-11-20 10:50:29,338 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/data/1c072e8f0/76fc2175e3a847c3b24758a5af9ad153/FLAG882c2e50a [2022-11-20 10:50:29,362 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/data/1c072e8f0/76fc2175e3a847c3b24758a5af9ad153 [2022-11-20 10:50:29,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:50:29,367 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:50:29,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:29,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:50:29,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:50:29,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:29" (1/1) ... [2022-11-20 10:50:29,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e551127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:29, skipping insertion in model container [2022-11-20 10:50:29,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:29" (1/1) ... [2022-11-20 10:50:29,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:50:29,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:50:29,703 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_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2022-11-20 10:50:29,712 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_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2022-11-20 10:50:30,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:30,743 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:50:30,756 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_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/sv-benchmarks/c/eca-rers2018/Problem11.c[778,791] [2022-11-20 10:50:30,758 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_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/sv-benchmarks/c/eca-rers2018/Problem11.c[817,830] [2022-11-20 10:50:30,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:50:31,054 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:50:31,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31 WrapperNode [2022-11-20 10:50:31,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:50:31,057 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:31,057 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:50:31,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:50:31,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,345 INFO L138 Inliner]: procedures = 286, calls = 252, calls flagged for inlining = 148, calls inlined = 148, statements flattened = 1876 [2022-11-20 10:50:31,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:50:31,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:50:31,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:50:31,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:50:31,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,543 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:50:31,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:50:31,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:50:31,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:50:31,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (1/1) ... [2022-11-20 10:50:31,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:50:31,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:50:31,755 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:50:31,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:50:31,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_a [2022-11-20 10:50:31,860 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_a [2022-11-20 10:50:31,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error_b [2022-11-20 10:50:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error_b [2022-11-20 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:50:31,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:50:31,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:50:32,058 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:50:32,060 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:51:23,164 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:51:23,174 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:51:23,175 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-20 10:51:23,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:23 BoogieIcfgContainer [2022-11-20 10:51:23,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:51:23,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:51:23,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:51:23,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:51:23,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:29" (1/3) ... [2022-11-20 10:51:23,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77812571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:23, skipping insertion in model container [2022-11-20 10:51:23,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:31" (2/3) ... [2022-11-20 10:51:23,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77812571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:51:23, skipping insertion in model container [2022-11-20 10:51:23,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:51:23" (3/3) ... [2022-11-20 10:51:23,188 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11.c [2022-11-20 10:51:23,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:51:23,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 10:51:23,282 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:51:23,288 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;@5ec8034b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:51:23,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 10:51:23,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 513 states, 408 states have (on average 1.6274509803921569) internal successors, (664), 410 states have internal predecessors, (664), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-20 10:51:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:51:23,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:51:23,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:51:23,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:51:23,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:51:23,316 INFO L85 PathProgramCache]: Analyzing trace with hash -151746730, now seen corresponding path program 1 times [2022-11-20 10:51:23,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:51:23,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565445405] [2022-11-20 10:51:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:51:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:51:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:51:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:51:23,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:51:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565445405] [2022-11-20 10:51:23,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565445405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:51:23,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:51:23,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:51:23,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818798541] [2022-11-20 10:51:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:51:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:51:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:51:24,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:51:24,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:51:24,048 INFO L87 Difference]: Start difference. First operand has 513 states, 408 states have (on average 1.6274509803921569) internal successors, (664), 410 states have internal predecessors, (664), 100 states have call successors, (100), 2 states have call predecessors, (100), 2 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:51:27,375 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 [] [2022-11-20 10:51:29,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:32,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:34,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:36,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:38,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:39,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:43,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:45,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:50,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:52,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:55,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:56,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:51:59,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:01,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:03,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:05,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:07,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:09,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:11,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:13,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:15,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:18,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:20,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:22,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:23,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:26,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:28,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:30,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:32,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:34,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:36,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:38,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:41,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:43,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:44,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:46,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:49,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:51,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:53,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:54,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:56,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:52:58,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:01,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:03,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:05,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:07,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:07,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:07,159 INFO L93 Difference]: Finished difference Result 1062 states and 1895 transitions. [2022-11-20 10:53:07,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:53:07,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:53:07,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:07,175 INFO L225 Difference]: With dead ends: 1062 [2022-11-20 10:53:07,175 INFO L226 Difference]: Without dead ends: 545 [2022-11-20 10:53:07,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:53:07,184 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 150 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 105 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:07,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 852 Invalid, 1260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1120 Invalid, 35 Unknown, 0 Unchecked, 102.9s Time] [2022-11-20 10:53:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-20 10:53:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 540. [2022-11-20 10:53:07,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 438 states have (on average 1.6164383561643836) internal successors, (708), 537 states have internal predecessors, (708), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 808 transitions. [2022-11-20 10:53:07,257 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 808 transitions. Word has length 16 [2022-11-20 10:53:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:07,257 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 808 transitions. [2022-11-20 10:53:07,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 808 transitions. [2022-11-20 10:53:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 10:53:07,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:07,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:53:07,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:53:07,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1326248385, now seen corresponding path program 1 times [2022-11-20 10:53:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:07,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054991777] [2022-11-20 10:53:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:07,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:07,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:53:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789393637] [2022-11-20 10:53:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:07,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:07,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:07,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:07,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:53:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:07,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:53:07,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:07,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:07,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:07,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054991777] [2022-11-20 10:53:07,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:53:07,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789393637] [2022-11-20 10:53:07,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789393637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:07,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:07,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:07,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013104960] [2022-11-20 10:53:07,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:07,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:07,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:07,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:07,623 INFO L87 Difference]: Start difference. First operand 540 states and 808 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:07,741 INFO L93 Difference]: Finished difference Result 1333 states and 2089 transitions. [2022-11-20 10:53:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 10:53:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:07,746 INFO L225 Difference]: With dead ends: 1333 [2022-11-20 10:53:07,747 INFO L226 Difference]: Without dead ends: 929 [2022-11-20 10:53:07,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:07,749 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 601 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:07,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 1300 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:53:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-11-20 10:53:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 829. [2022-11-20 10:53:07,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 727 states have (on average 1.6960110041265475) internal successors, (1233), 826 states have internal predecessors, (1233), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1333 transitions. [2022-11-20 10:53:07,786 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1333 transitions. Word has length 24 [2022-11-20 10:53:07,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:07,787 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1333 transitions. [2022-11-20 10:53:07,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1333 transitions. [2022-11-20 10:53:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 10:53:07,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:07,789 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:53:07,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:07,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:07,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1836689822, now seen corresponding path program 1 times [2022-11-20 10:53:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:07,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537493740] [2022-11-20 10:53:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:08,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:53:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255039809] [2022-11-20 10:53:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:08,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:08,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:08,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:53:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:08,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:53:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:08,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:08,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:08,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537493740] [2022-11-20 10:53:08,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:53:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255039809] [2022-11-20 10:53:08,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255039809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:08,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:08,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:08,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384970856] [2022-11-20 10:53:08,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:08,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:08,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:08,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:08,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:08,310 INFO L87 Difference]: Start difference. First operand 829 states and 1333 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:10,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:12,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:13,237 INFO L93 Difference]: Finished difference Result 1514 states and 2495 transitions. [2022-11-20 10:53:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 10:53:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:13,246 INFO L225 Difference]: With dead ends: 1514 [2022-11-20 10:53:13,246 INFO L226 Difference]: Without dead ends: 1501 [2022-11-20 10:53:13,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:13,248 INFO L413 NwaCegarLoop]: 661 mSDtfsCounter, 611 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:13,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1276 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-20 10:53:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-20 10:53:13,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1408. [2022-11-20 10:53:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1306 states have (on average 1.7419601837672283) internal successors, (2275), 1405 states have internal predecessors, (2275), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:13,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2375 transitions. [2022-11-20 10:53:13,306 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2375 transitions. Word has length 25 [2022-11-20 10:53:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:13,306 INFO L495 AbstractCegarLoop]: Abstraction has 1408 states and 2375 transitions. [2022-11-20 10:53:13,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2375 transitions. [2022-11-20 10:53:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:53:13,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:13,314 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:53:13,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:13,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:13,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1103519549, now seen corresponding path program 1 times [2022-11-20 10:53:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:13,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207937157] [2022-11-20 10:53:13,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:13,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:53:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237698111] [2022-11-20 10:53:13,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:13,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:13,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:13,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:53:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:13,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:53:13,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:13,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:13,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:13,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:13,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207937157] [2022-11-20 10:53:13,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:53:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237698111] [2022-11-20 10:53:13,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237698111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:13,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:13,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:53:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530530376] [2022-11-20 10:53:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:13,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:13,777 INFO L87 Difference]: Start difference. First operand 1408 states and 2375 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:16,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:18,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:20,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:23,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:25,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:27,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:29,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:31,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:33,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:35,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:53:35,888 INFO L93 Difference]: Finished difference Result 3726 states and 6379 transitions. [2022-11-20 10:53:35,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:53:35,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 10:53:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:53:35,898 INFO L225 Difference]: With dead ends: 3726 [2022-11-20 10:53:35,899 INFO L226 Difference]: Without dead ends: 2454 [2022-11-20 10:53:35,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:35,902 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 523 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 50 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1313 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:53:35,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1313 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 119 Invalid, 10 Unknown, 0 Unchecked, 22.1s Time] [2022-11-20 10:53:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2454 states. [2022-11-20 10:53:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2454 to 2350. [2022-11-20 10:53:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2248 states have (on average 1.7184163701067616) internal successors, (3863), 2347 states have internal predecessors, (3863), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3963 transitions. [2022-11-20 10:53:35,962 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3963 transitions. Word has length 26 [2022-11-20 10:53:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:53:35,962 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 3963 transitions. [2022-11-20 10:53:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3963 transitions. [2022-11-20 10:53:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:53:35,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:53:35,964 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:53:35,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:53:36,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:36,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:53:36,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:53:36,171 INFO L85 PathProgramCache]: Analyzing trace with hash -402454971, now seen corresponding path program 1 times [2022-11-20 10:53:36,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:53:36,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283574945] [2022-11-20 10:53:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:36,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:53:36,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:53:36,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314219278] [2022-11-20 10:53:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:53:36,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:53:36,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:53:36,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:53:36,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:53:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:53:36,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:53:36,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:53:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:53:36,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:53:36,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:53:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283574945] [2022-11-20 10:53:36,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:53:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314219278] [2022-11-20 10:53:36,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314219278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:53:36,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:53:36,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:53:36,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627948427] [2022-11-20 10:53:36,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:53:36,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:53:36,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:53:36,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:53:36,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:53:36,433 INFO L87 Difference]: Start difference. First operand 2350 states and 3963 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:53:38,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:42,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:46,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:48,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:49,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:50,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:52,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:54,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:56,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:53:58,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:00,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:02,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:04,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:06,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:08,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:10,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:11,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:11,984 INFO L93 Difference]: Finished difference Result 6623 states and 11352 transitions. [2022-11-20 10:54:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 10:54:11,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:12,003 INFO L225 Difference]: With dead ends: 6623 [2022-11-20 10:54:12,004 INFO L226 Difference]: Without dead ends: 4409 [2022-11-20 10:54:12,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:12,009 INFO L413 NwaCegarLoop]: 777 mSDtfsCounter, 578 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 40 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:12,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1291 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 130 Invalid, 14 Unknown, 0 Unchecked, 35.5s Time] [2022-11-20 10:54:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-11-20 10:54:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4336. [2022-11-20 10:54:12,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4234 states have (on average 1.7347661785545583) internal successors, (7345), 4333 states have internal predecessors, (7345), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:12,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 7445 transitions. [2022-11-20 10:54:12,132 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 7445 transitions. Word has length 26 [2022-11-20 10:54:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:12,132 INFO L495 AbstractCegarLoop]: Abstraction has 4336 states and 7445 transitions. [2022-11-20 10:54:12,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 7445 transitions. [2022-11-20 10:54:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 10:54:12,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:12,135 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:54:12,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:12,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:12,341 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash -845354111, now seen corresponding path program 1 times [2022-11-20 10:54:12,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:12,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43183553] [2022-11-20 10:54:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:12,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:12,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:54:12,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967025870] [2022-11-20 10:54:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:12,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:12,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:12,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:12,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:54:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:12,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:54:12,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:12,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:12,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:12,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43183553] [2022-11-20 10:54:12,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:54:12,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967025870] [2022-11-20 10:54:12,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967025870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:12,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:12,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 10:54:12,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065201589] [2022-11-20 10:54:12,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:12,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:12,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:12,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:12,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:12,559 INFO L87 Difference]: Start difference. First operand 4336 states and 7445 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:12,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:12,699 INFO L93 Difference]: Finished difference Result 8500 states and 14669 transitions. [2022-11-20 10:54:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 10:54:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:12,729 INFO L225 Difference]: With dead ends: 8500 [2022-11-20 10:54:12,730 INFO L226 Difference]: Without dead ends: 8494 [2022-11-20 10:54:12,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:12,735 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 639 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:12,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1305 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:54:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8494 states. [2022-11-20 10:54:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8494 to 8392. [2022-11-20 10:54:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8290 states have (on average 1.7429433051869723) internal successors, (14449), 8389 states have internal predecessors, (14449), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 14549 transitions. [2022-11-20 10:54:13,097 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 14549 transitions. Word has length 26 [2022-11-20 10:54:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:13,097 INFO L495 AbstractCegarLoop]: Abstraction has 8392 states and 14549 transitions. [2022-11-20 10:54:13,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 14549 transitions. [2022-11-20 10:54:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 10:54:13,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:13,099 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:54:13,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 10:54:13,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:13,305 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:13,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:13,305 INFO L85 PathProgramCache]: Analyzing trace with hash 408094664, now seen corresponding path program 1 times [2022-11-20 10:54:13,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:13,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506521152] [2022-11-20 10:54:13,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:13,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:13,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:54:13,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323925618] [2022-11-20 10:54:13,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:13,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:13,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:13,323 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:13,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:54:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:13,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:54:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:13,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506521152] [2022-11-20 10:54:13,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:54:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323925618] [2022-11-20 10:54:13,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323925618] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:13,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:13,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:13,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336972339] [2022-11-20 10:54:13,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:13,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:13,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:13,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:13,651 INFO L87 Difference]: Start difference. First operand 8392 states and 14549 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:15,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:17,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:18,532 INFO L93 Difference]: Finished difference Result 24645 states and 42902 transitions. [2022-11-20 10:54:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 10:54:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:18,597 INFO L225 Difference]: With dead ends: 24645 [2022-11-20 10:54:18,597 INFO L226 Difference]: Without dead ends: 16389 [2022-11-20 10:54:18,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:18,608 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 603 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1320 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:18,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1320 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-20 10:54:18,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16389 states. [2022-11-20 10:54:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16389 to 16288. [2022-11-20 10:54:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16288 states, 16186 states have (on average 1.7420610404052885) internal successors, (28197), 16285 states have internal predecessors, (28197), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:19,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16288 states to 16288 states and 28297 transitions. [2022-11-20 10:54:19,251 INFO L78 Accepts]: Start accepts. Automaton has 16288 states and 28297 transitions. Word has length 27 [2022-11-20 10:54:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:19,252 INFO L495 AbstractCegarLoop]: Abstraction has 16288 states and 28297 transitions. [2022-11-20 10:54:19,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 16288 states and 28297 transitions. [2022-11-20 10:54:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 10:54:19,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:19,259 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:54:19,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 10:54:19,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:19,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1314669293, now seen corresponding path program 1 times [2022-11-20 10:54:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:19,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759085494] [2022-11-20 10:54:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:19,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:19,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:54:19,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322447144] [2022-11-20 10:54:19,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:19,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:19,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:19,528 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:19,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 10:54:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:54:19,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:19,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:19,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:19,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759085494] [2022-11-20 10:54:19,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:54:19,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322447144] [2022-11-20 10:54:19,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322447144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:19,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:19,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:19,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054483522] [2022-11-20 10:54:19,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:19,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:19,727 INFO L87 Difference]: Start difference. First operand 16288 states and 28297 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:22,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:24,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:26,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:28,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:31,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:33,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:33,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:33,320 INFO L93 Difference]: Finished difference Result 47966 states and 83571 transitions. [2022-11-20 10:54:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:33,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 10:54:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:33,503 INFO L225 Difference]: With dead ends: 47966 [2022-11-20 10:54:33,504 INFO L226 Difference]: Without dead ends: 31814 [2022-11-20 10:54:33,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:33,519 INFO L413 NwaCegarLoop]: 707 mSDtfsCounter, 594 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:33,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 1335 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 13.4s Time] [2022-11-20 10:54:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31814 states. [2022-11-20 10:54:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31814 to 31712. [2022-11-20 10:54:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31712 states, 31610 states have (on average 1.7401138880101235) internal successors, (55005), 31709 states have internal predecessors, (55005), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31712 states to 31712 states and 55105 transitions. [2022-11-20 10:54:34,747 INFO L78 Accepts]: Start accepts. Automaton has 31712 states and 55105 transitions. Word has length 29 [2022-11-20 10:54:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:34,748 INFO L495 AbstractCegarLoop]: Abstraction has 31712 states and 55105 transitions. [2022-11-20 10:54:34,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 31712 states and 55105 transitions. [2022-11-20 10:54:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 10:54:34,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:34,749 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:54:34,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:34,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:54:34,957 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2099359570, now seen corresponding path program 1 times [2022-11-20 10:54:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864020646] [2022-11-20 10:54:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:34,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:54:34,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864796847] [2022-11-20 10:54:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:34,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:34,986 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:35,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 10:54:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:35,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:54:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:35,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864020646] [2022-11-20 10:54:35,324 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:54:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864796847] [2022-11-20 10:54:35,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864796847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:35,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:35,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:35,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267591673] [2022-11-20 10:54:35,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:35,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:35,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:35,330 INFO L87 Difference]: Start difference. First operand 31712 states and 55105 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:36,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:36,749 INFO L93 Difference]: Finished difference Result 63288 states and 110054 transitions. [2022-11-20 10:54:36,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:36,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-20 10:54:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:36,928 INFO L225 Difference]: With dead ends: 63288 [2022-11-20 10:54:36,928 INFO L226 Difference]: Without dead ends: 63285 [2022-11-20 10:54:36,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:36,944 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 623 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:36,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1423 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 10:54:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63285 states. [2022-11-20 10:54:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63285 to 63184. [2022-11-20 10:54:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63184 states, 63082 states have (on average 1.739402682223138) internal successors, (109725), 63181 states have internal predecessors, (109725), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:38,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63184 states to 63184 states and 109825 transitions. [2022-11-20 10:54:38,835 INFO L78 Accepts]: Start accepts. Automaton has 63184 states and 109825 transitions. Word has length 30 [2022-11-20 10:54:38,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:38,836 INFO L495 AbstractCegarLoop]: Abstraction has 63184 states and 109825 transitions. [2022-11-20 10:54:38,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:38,836 INFO L276 IsEmpty]: Start isEmpty. Operand 63184 states and 109825 transitions. [2022-11-20 10:54:38,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 10:54:38,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:38,839 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 10:54:38,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 10:54:39,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:39,045 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 856506849, now seen corresponding path program 1 times [2022-11-20 10:54:39,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:39,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525340681] [2022-11-20 10:54:39,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:39,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:39,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:54:39,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666390946] [2022-11-20 10:54:39,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:39,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:39,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:39,210 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:39,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 10:54:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:39,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:54:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:39,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:39,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:39,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525340681] [2022-11-20 10:54:39,401 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:54:39,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666390946] [2022-11-20 10:54:39,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666390946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:39,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:39,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465930136] [2022-11-20 10:54:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:39,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:39,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:39,404 INFO L87 Difference]: Start difference. First operand 63184 states and 109825 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:41,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:43,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:46,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:47,012 INFO L93 Difference]: Finished difference Result 186843 states and 325206 transitions. [2022-11-20 10:54:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:47,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 10:54:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:54:47,447 INFO L225 Difference]: With dead ends: 186843 [2022-11-20 10:54:47,448 INFO L226 Difference]: Without dead ends: 123661 [2022-11-20 10:54:47,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:47,496 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 618 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:54:47,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1341 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-20 10:54:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123661 states. [2022-11-20 10:54:49,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123661 to 123561. [2022-11-20 10:54:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123561 states, 123459 states have (on average 1.734640649932366) internal successors, (214157), 123558 states have internal predecessors, (214157), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123561 states to 123561 states and 214257 transitions. [2022-11-20 10:54:50,139 INFO L78 Accepts]: Start accepts. Automaton has 123561 states and 214257 transitions. Word has length 31 [2022-11-20 10:54:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:54:50,139 INFO L495 AbstractCegarLoop]: Abstraction has 123561 states and 214257 transitions. [2022-11-20 10:54:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 123561 states and 214257 transitions. [2022-11-20 10:54:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:54:50,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:54:50,141 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-20 10:54:50,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-20 10:54:50,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:54:50,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:54:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:54:50,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1897923797, now seen corresponding path program 1 times [2022-11-20 10:54:50,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:54:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948529588] [2022-11-20 10:54:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:54:50,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:54:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897545613] [2022-11-20 10:54:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:54:50,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:54:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:54:50,375 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:54:50,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 10:54:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:54:50,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:54:50,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:54:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:54:50,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:54:50,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:54:50,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948529588] [2022-11-20 10:54:50,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:54:50,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897545613] [2022-11-20 10:54:50,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897545613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:54:50,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:54:50,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:54:50,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954472466] [2022-11-20 10:54:50,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:54:50,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:54:50,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:54:50,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:54:50,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:54:50,607 INFO L87 Difference]: Start difference. First operand 123561 states and 214257 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:54:54,074 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 [] [2022-11-20 10:54:57,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:54:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:54:59,492 INFO L93 Difference]: Finished difference Result 370425 states and 642493 transitions. [2022-11-20 10:54:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:54:59,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 10:54:59,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:00,127 INFO L225 Difference]: With dead ends: 370425 [2022-11-20 10:55:00,127 INFO L226 Difference]: Without dead ends: 246993 [2022-11-20 10:55:00,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:00,184 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 632 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:00,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1308 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-11-20 10:55:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246993 states. [2022-11-20 10:55:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246993 to 246889. [2022-11-20 10:55:03,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246889 states, 246787 states have (on average 1.7339487088055692) internal successors, (427916), 246886 states have internal predecessors, (427916), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246889 states to 246889 states and 428016 transitions. [2022-11-20 10:55:04,972 INFO L78 Accepts]: Start accepts. Automaton has 246889 states and 428016 transitions. Word has length 32 [2022-11-20 10:55:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:04,973 INFO L495 AbstractCegarLoop]: Abstraction has 246889 states and 428016 transitions. [2022-11-20 10:55:04,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:04,973 INFO L276 IsEmpty]: Start isEmpty. Operand 246889 states and 428016 transitions. [2022-11-20 10:55:04,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:55:04,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:04,974 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-20 10:55:04,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:05,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:05,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 876855443, now seen corresponding path program 1 times [2022-11-20 10:55:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:05,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230411459] [2022-11-20 10:55:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:05,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:55:05,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121319082] [2022-11-20 10:55:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:05,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:05,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:05,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:05,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 10:55:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:55:05,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:05,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:05,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230411459] [2022-11-20 10:55:05,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:55:05,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121319082] [2022-11-20 10:55:05,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121319082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:05,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:05,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:55:05,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007629255] [2022-11-20 10:55:05,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:05,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:05,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:05,419 INFO L87 Difference]: Start difference. First operand 246889 states and 428016 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:07,428 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 [] [2022-11-20 10:55:09,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:55:11,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 10:55:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:14,557 INFO L93 Difference]: Finished difference Result 493770 states and 856020 transitions. [2022-11-20 10:55:14,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:14,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 10:55:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:14,964 INFO L225 Difference]: With dead ends: 493770 [2022-11-20 10:55:14,964 INFO L226 Difference]: Without dead ends: 246883 [2022-11-20 10:55:15,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:15,075 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 113 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:15,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1296 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 3 Unknown, 0 Unchecked, 6.4s Time] [2022-11-20 10:55:15,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246883 states. [2022-11-20 10:55:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246883 to 246883. [2022-11-20 10:55:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246883 states, 246781 states have (on average 1.7339462924617373) internal successors, (427905), 246880 states have internal predecessors, (427905), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246883 states to 246883 states and 428005 transitions. [2022-11-20 10:55:19,530 INFO L78 Accepts]: Start accepts. Automaton has 246883 states and 428005 transitions. Word has length 32 [2022-11-20 10:55:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:19,530 INFO L495 AbstractCegarLoop]: Abstraction has 246883 states and 428005 transitions. [2022-11-20 10:55:19,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 246883 states and 428005 transitions. [2022-11-20 10:55:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:55:19,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:19,531 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-20 10:55:19,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 10:55:19,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:19,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:19,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:19,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1171709481, now seen corresponding path program 1 times [2022-11-20 10:55:19,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:19,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326491732] [2022-11-20 10:55:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:19,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:19,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:55:19,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45037421] [2022-11-20 10:55:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:19,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:19,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:19,753 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:19,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 10:55:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:55:19,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:19,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:19,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326491732] [2022-11-20 10:55:19,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:55:19,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45037421] [2022-11-20 10:55:19,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45037421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:19,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:19,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:55:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925020373] [2022-11-20 10:55:19,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:19,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:19,978 INFO L87 Difference]: Start difference. First operand 246883 states and 428005 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:55:23,203 INFO L93 Difference]: Finished difference Result 493643 states and 855882 transitions. [2022-11-20 10:55:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:55:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 10:55:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:55:24,010 INFO L225 Difference]: With dead ends: 493643 [2022-11-20 10:55:24,010 INFO L226 Difference]: Without dead ends: 493639 [2022-11-20 10:55:24,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:24,080 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 620 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:55:24,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [620 Valid, 1293 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:55:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493639 states. [2022-11-20 10:55:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493639 to 493539. [2022-11-20 10:55:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493539 states, 493437 states have (on average 1.7299736339188183) internal successors, (853633), 493536 states have internal predecessors, (853633), 100 states have call successors, (100), 2 states have call predecessors, (100), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493539 states to 493539 states and 853733 transitions. [2022-11-20 10:55:33,337 INFO L78 Accepts]: Start accepts. Automaton has 493539 states and 853733 transitions. Word has length 32 [2022-11-20 10:55:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:55:33,337 INFO L495 AbstractCegarLoop]: Abstraction has 493539 states and 853733 transitions. [2022-11-20 10:55:33,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:55:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 493539 states and 853733 transitions. [2022-11-20 10:55:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-20 10:55:33,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:55:33,339 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-20 10:55:33,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 10:55:33,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 10:55:33,546 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION === [reach_error_aErr0ASSERT_VIOLATIONERROR_FUNCTION, reach_error_bErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:55:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:55:33,546 INFO L85 PathProgramCache]: Analyzing trace with hash -752572324, now seen corresponding path program 1 times [2022-11-20 10:55:33,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:55:33,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076644694] [2022-11-20 10:55:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:33,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:55:33,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 10:55:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718300238] [2022-11-20 10:55:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:55:33,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:55:33,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:55:33,572 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:55:33,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d5a2ff2-f30a-42ba-acd8-26b037e953bd/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 10:55:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:55:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 10:55:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:55:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:55:33,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:55:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:55:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076644694] [2022-11-20 10:55:33,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 10:55:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718300238] [2022-11-20 10:55:33,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718300238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:55:33,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:55:33,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:55:33,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087186635] [2022-11-20 10:55:33,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:55:33,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:55:33,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:55:33,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:55:33,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:55:33,784 INFO L87 Difference]: Start difference. First operand 493539 states and 853733 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)